Shell small, elevated, slender, subacute, solid, flesh-colored, more . orless variegated with brown and white, with one and a half smooth polished, core and six sculptured subsequent wreaths; suture distinct, not deep, the edge of the whorl in front of it collected in rather irregular, small, short posts; spiral sculpture including two primary ridges near the periphery, with two more on the base, the small sculpture as in B. zclotcs, the stronger ridges articulated with brown and white; aperture hemispherical, the outer lip numb, white, heavy, reflexed; body and pillar with a thin white callus; .. pillar twisted, thickened at edge; canal wide, recurved with a strong fasciole. Shell of moderate size, solid, capacious, not contracted at the suture, with about six whorls, covered with a closely continuous smooth, unpolished, yellowish periostracum; apex defective; spiral sculpture of numerous, uniform, flat spiral threads, with narrower, finely channeled interstices, about 3 to a millimeter; apex conical, the edge of the whorl more or less finely folded before the suture; diaphragm wide, rounded; throat purplish brown. Shell solid, heavy, sharp, white, covered with a loose, thin, polished periostracum, and with about seven rapidly increasing whorls; suture distinct, not appressed; whorl flat in front of the suture, oblique to the shoulder and spirally sculptured with (on the last whorl about 12) sharply narrow, sometimes duplex twisting threads, with wider spaces between the sutures; there is one strong spiral at the shoulder and another at the circumference, with three or four others of less size, and some still smaller intercalary threads and fine spiral streaks?, the latter occurring most on the last.
Shell large, hard, short conical, with about six ribs, white, clothed with a dense, thick, reticulate pubescent periostracum of an olive color; whorls grow rapidly, with a raised, small, spiral ridge forming a wide, shallow channel before the suture. DAM,] NEW TYPES OF PUNCHES 151 which is usually more or less corroded; on the shoulder is a similar spiral and sometimes one or two fainter in front of it; the remaining sculpture is entirely fine spiral threads with narrower interlaced spaces, crossed by ascending lines, while in both lines and threads the lamellae of the periostracum emerge from the surface in a dense layer of velvet; aperture milky white, body and spine heavily callose; outer rim thick, expanded, excavated posteriorly.
152 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 This fine species belongs to the same general group in the genus
Shell acutely conical, thin, of an opaque brownish consistency (like B. castaneum Dall), with about seven tower-shaped whorls; core smooth, from two whorls; suture clear, with a wide channel in front, thanks to the first spiral rib; axial sculpture of faint incremental lines; surface with an extremely thin, smooth, dehiscent periostra-. This is the most remarkable species known for a long time and belongs to the group of B. The strong, tightly cut, regular spiral ribs, with their deep interstices, give a very striking aspect to the shell.
Shell large, thin, pinkish-white or purple-brown, with a hint of orange on the pillar and part of the outer lip: seven or more whorls, constricted at the suture, outer lip semicircular, thin; ash permeable; spiral sculpture as in typical insularis, but with the major. This form differs from the insularis proper by its rounded whorls, which do not extend away from the front of the suture, which is emphasized as if constricted, and by its more emphatic spiral sculpture and larger size. Station 5021, on the east coast of Sakhalin Island, and several stations in the eastern part of the Bering Sea.
This form is more elongated, with the same number of whorls, the canal at the suture is wider, the whorls more tabulate and parallel than the typical pcricochlion of Schrenck. Shell solid, compact, obtuse, pale brown, of about six whorls; apex defective; whorls rounded, with suture inconspicuous, anteriorly gently oblique, with two or three prominent spiral cords separated by wider spirally threaded interspaces; the center of the whorls with three prominent spiral ridges, the base with ten or twelve less. Shell solid, purplish-brown, melting, with two rather large, smooth cores and five subsequent whorls; suture appressed, distinct, the curl before it somewhat narrowed, axial sculpture of eight strong, prominent, rounded ribs conspicuous at the shoulder and at the periphery, but obsolescent at the base, somewhat flexible, the entire surface marked by a low, sharp , slightly increased increment rough is lines.
Shield small, white, broad, noticeably depressed, with about five whorls; core eroded; subsequent whorls rapidly enlarged, suture almost canalized, spiral sculpture of, before the suture, three or four small, square, revolving ribs, with wider excavated interstices, then a strong peripheral keel, then six or seven, gradually decreasing 'on the base and the canal, always narrower than the interstices, with an occasional intermediate thread; spire and base short conical; opening wide, outer lip sharp, inside white, smooth; body with a touch of callus; pillar short, strongly twisted and flaring forward; canal very short, wide and recurved, without siphonal fasciole.
158 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50
A small, slender shell with dense, prominent, rather irregular, oblique ribs that do not stop abruptly at the edge of the base, as in T. 50 low, rounded ribs, with mostly wider spaces, extending irregularly beyond the periphery more or less on to the base; the posterior part of the whorls shows a few weak, almost obsolete, small spiral ridges, but the base is sharply spiral; aperture semilunar;. The wrinkles, although not so violent, and the color of the shell are reminiscent of Buccinum tenue.
The variety of crctacea Reeve (like Buccinum) is distinguished by the absence of fine lines on the greater part of the shell. The young are sometimes purplish-brown, with ivory-white axial ribs terminating at the bottom edge, which is sharply spirally grooved, forming a shell of very striking appearance. Shell small, slender, sharp, with a strong blackish or brownish periostracum, paler or even greenish white at the base and column.
These differences, which seem insignificant when analyzed, affect the general aspect of the shell to a disproportionate extent, so that at first glance it looks very different. The shell is small, fusiform, periostracum milky gray in color over a chalky substrate, with about six towering whorls, more or less eroded, but with a swollen core and operculum of Vohitopsius;. whorls plump, flat in front of suture, but without angle or keel at shoulder; surface with a smooth band near the suture, the rest with fine spiral striae; interspaces flat except on the canal where they are somewhat rounded, and sulci. expand into channels somewhat narrower than the intervening ridges. Aperture oblong, vivid purple inside, a purple callus on body, column white; outer lip slightly expanded, simple, sharp; canal wide, curved, axis not penetrating. The dextral form of this species has not hitherto been known, although a dextral specimen of V. P.) deformis Gray has for some years been in the country collection from the eastern part of the Bering Sea.
A very orderly, compact and unique small species in which the main incised lines may extend over much of the posterior whorl in some individuals. Shell thin, transparent white, with a hazy brown band before the suture, one on the last whorl before the periphery, and a third on the canal; oblong, sharp, slender, whorls of a rounded top, which looks like the tip of the Scala; suture distinct, with two core (eroded) and five consecutive whorls; veins 10 to 12, very thin, acute, reflexed, patulous near the suture but not chronic or spinose; early whorls with three or four distant indistinct, spiral threads, later becoming obsolete; surface also finely closely spirally striated; aperture oblong-oval, outer lip thin. In the same cast was obtained Lfptotliyra (Phancrolcpida) trans-scnua Watson, which I distinguish from typical Leptothyras by the absence of spiral sculpture, an unusual shagreen-like surface, and an operculum in which there are no whorls, as in typical Lcptotliyra they are visible externally and flat, but are hidden by a callus coating and have a concave surface.
170 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50
The lower valve is white, but its sculpture is similar to that of the upper valve. Distinct in shape and colour, but not identical, so far as can be said, with any of A. Shell large for the genus, thick, extremely thin, oblong-ovate, pale horn-coloured, finely sculptured on the ray , spaces channeled distally, bit narrower than rays; beaks prosocoelous, prominent: hinge line very short, valves nearly equilateral, sides similar, base produced medially; internal ligament strong, divided anteriorly, the ends slightly crowded but not confluent except immediately below the beak; alt., 18; Ion., 14;.
Shell small, thin, arcuate, oblong, olive green or brownish, with a small striated anterior area, deeply impressed central area, and. Shell small, solid, pale gray or straw-colored, with low, rather anterior beaks; front short, rounded; back longer, attenuate; base evenly curved; about two-thirds of valve with strong concentric waves with subequal interspaces, remainder concentrically striated; interior bluish white, with the center of the disc yellowish; pallial sinus very short; hinge normal, heavy. Roar, more inflated and solid, and more attenuated behind than any of the arctic or Aleutian species.
Shell thin, whitish, more or less finely granular on the outer surface, with a very thin pale yellowish periostracum, equal, nearly equilateral; a form resembling Mya arenaria, but pro-.
