This process was repeated four times, ending with the transfer of the spore to the alcohol bath. The fine reticular structure of the individual elements of the reticulum is shown on plate 10 (figures 5, 6). Analyzes of five different samples of the spore gave essentially the same results as shown here.
The reticulate sculpture is rather poorly visible on the distal and equatorial part of the spore body. Ideally, the cervical chamber is present at the base of the neck, but was not explored. Evidence of a cervical chamber at the base of the neck is shown in Plate 20 (Figure 3) and Plate 21 (Figure 6).
The photographs [plate citation] clearly show the formation of the body from a web-like framework.
PLATES
FIGURE 1-7.— Verrutriletes carbunculus (Dijkstra) Potonie: 1, Vertical section of spore coat with g e m m a in place, X 2000; 2, outer exoexin surface with gemma and former site of gemma attachment (arrow), X 1000; 3, oblique view of inner surface of spore coat showing indentation immediately below gemma, X 1000. FIGURE 1-6.—Thylakosporites retiarius (Hughes) Potonie: 1, Apical view of tetrahedral tetrad, X 40; 2, basal view of tetrahedral tetrad of spores, X 40; 5, area at x in figure 2 showing reticulum of outer exoexine partially free of layer of organic material covering entire tetrahedral tetrad, X 125. 2, Distal view, X 100; 3, proximal view with area of commissure broken away, X 100; 4, image at x in fig. 3 with the sample tilted towards the viewer at approx. 30°, showing points of attachment of elements of reticulum, both intact and broken, X 325; 5, cross-section of spore coat (o-ex = outer exoexine, i-ex = inner exoexine, end = endexine), X 2500; 6, fine reticulate sculpture of the outer exoexine, X orderly arrangement of globular elements forming inner exoexine, X reticulate structure of endexine seen in surface view, X 10,000.
FIGURE 1-6.—Thylakosporites retiarius (Hughes) Potonie: 1, slightly oblique proximal view showing erosion and corrosion of spore coat, X 150; 2, oblique distal view showing areas of corrosion and separation of spore coating elements, X 150; 3, area x in Figure 2 (end = endexin, i-ex = inner exoexine, o-ex = outer exoexine), X 500. FIGURE 1-4.-Crybelosporites striatus (Cookson and Dettmann) D e t t m a n n : 1, Microspores resting in folds of acrolamellae of megaspore, X 170; 2, folding of outer exoexine (perine) of spores, X 750; 4, single trace at x in figure 2 showing the reticulate surface of inner exoexine and outer cavate exoexine, X 2000. FIGURES 1-4.—Arcellites disciformis (Miner) Ellis and Tschudy: 1, Equatorial view of specimen mounted at tips of acrolamellae, tubular nature of body appendages clearly demonstrated, X 170; 2, distal view showing distribution of body appendages and punctate texture of outer exoexine, X 170.
FIGURES 1-4.—Arcellites disciformis (Miner) Ellis and Tschudy: 1, crushed specimen showing separation of individual acrolamellae, X 170; 2, enlarged view showing details of acrolamella margin morphology, X 350. FIGURES 1-4.— Arcellites disciformis (Miner) Ellis and Tschudy: 1, Cavernous structure of outer exoexine of spore body and continuation of structure into tubular appendage, X 1000; 2, pitted surface structure of outer exoexine X 5500. FIGURES 1-4.—Arcellites disciformis (Miner) Ellis and Tschudy: 1, spore body transversely sectioned to show structure of spore coat, X 240; 2, view of x in Fig. 1 (o-ex = outer exoexine, i-ex = outer exoexine, end = endexine), X 4000.
FIGURES 1-5.—Arcellites disciformis (Miner) Ellis and Tschudy: 1, body appendages intact and with apex broken, X 750; 2, appendage with torn apex, showing a partially collapsed bulbous tip, X 1500; 5, view down into body appendage showing reticulate structure of inner exoexine at base and characteristic structure of outer exoexine, X 3200. FIGURES 1-4.— Arcellites disciformis (Miner) Ellis and Tschudy: 1, equatorial view of specimen showing plane section required to reveal position of Y-mark, X 170; 2, view of the cavity of the spore body labeled Y in a position corresponding to the area immediately below the cavity formed by the acrolamellae, X 350. FIGURES 1-4.— Hall and Nicolson types of paxilitriletes: 1, view of x in Plate 22 (Fig 4) shows long capillaries along laesura margins, shorter capillaries arising at muri junctions, part of equatorial flange (lower right), and fused bases of appendages immediately adjacent to laesura, X 600; 2, detail at x in Fig. 1 showing reticulate sculpture of outer exoexine surface, X 2200.
Manuscripts intended for serial publication receive substantive review within their original Smithsonian museums or offices and are submitted to the Smithsonian Institution Press with approval of the appropriate museum authority on Form S I - 3 6. First page of text should have the title and author at the top carry of the page and an unnumbered footnote at the bottom consisting of author's name and professional mailing address. Formal tables (numbered, with table headers, box headers, stubs, lines) should be submitted as camera copy, but the author should contact the series department of the Press for editorial attention and preparation assistance prior to final typing of this matter.
Synonymy in zoology and paleobiology series should use the short form (taxon, author, year:page), with the full reference at the end of the paper under "Literature Cited". Footnotes, if few, whether footnotes or bibliographical, should be typed at the bottom of the text page on which the reference appears. 34; When aligning and arranging elements, follow the format of the series for which the manuscript is intended.
Legends for illustrations should not be attached to the art or included within the text, but should be submitted at the end of the manuscript - with as many legends typed, double-spaced, on one page as appropriate.
