34; It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge.". A redescription is given for all the species except eight which are noted with an asterisk, as they have already been treated elsewhere in a revision of the chondracanthid genera (Ho, 1970) In the summer of 1967, while I was doing a revisional study of the family, all the chondracanthid copepods in the USNM collections were reexamined.
This re-study has revealed that six of the twenty-four reported species are conspecific with other species, that the specimens from Woods Hole, Massachusetts, reported as Triglae Or alien by Wilson (1932) are actually one species (Rebelula bouvieri) of the family Sphyriidae, and that the specimen from Dry Tortugas, Florida, identified as Chondiacanthus nodosus by Wilson (1935) is actually a new species. Consequently, in accordance with my recently revised genera of Chondracanthidae (Ho 1970) and with the addition of a species newly recorded in Florida, there are now nineteen species representing nine genera known to occur in this region. The purpose of presenting here the redescriptions of species occurring in eastern North America is, accordingly, to clear up past confusion in specific identification and to present an orderly basis for future study of North American chondracanthid copepod species. .
As eight of these nineteen species are the type species of their genera and have already been redescribed in a revision of the genera (Ho 1970), the following redescriptions apply only to the remaining eleven species, but all nineteen species are included in the key. It differs from other species in the genus by the following combinations of characters: large size (length 10.58 mm); swollen, fleshy first antenna; spinules on posterior margin of labrum; and long, attenuate bilobed legs.
Figure 4rf) larger than leg 2 (Figure 4e), both bearing a long outer seta on protopod. First
Caudal ramus differs from the female in having a rather indistinct knob-like process and uniformly tapering terminal process. Mandible (Figure 4c) with 18 to 19 teeth on the convex side and 11 to 13 teeth on the concave side, where there is an additional row of 3 teeth.
Figure 6g) much smaller than leg 2 (Fig- ure 6h), both having bluntly pointed rami and
The rather pointed rami in the two pairs of legs, the swollen first antenna, the dentate posterior edge of the labrum and the hood-like. The only difference between the two species is their body size; the first is 10.5 mm long (Oakley, while the largest specimen of A. However, when Stuardo and Fagetti (1960) made an extensive study of the copepod parasites of the same species of hake in Valparaiso Bay, they found this particular parasite not back.
One of the two ovigerous females has all mouthparts and the first pair of legs removed, and the other has the right second antenna and all oral appendages except the maxillipeds removed. REMARKS. — The male of this species was neither described nor figured in Rathbun's (1886) original description; he only noted (page 324) that "the male was attached to most females". Wilson stated that the man was "unknown." However, the male is actually quite peculiar in having an accessory antenna-like element on the other an-. The presence of a large number of teeth on the lower jaw, the second upper jaw and the terminal claw of the upper jaw is also unique in the genus.
REMARKS.—The considerably smaller specimens taken from hake caught off Florida (author's collection) are only about half the size of specimens taken in other parts of the Atlantic Ocean. Second antenna (Fig. 23c) 2-segmented; first segment thick, with a small dorsal process; the second segment is a curved hook that carries 2 attachments (1 internal and the other external). According to them, the female embeds her head in a tumor on the gill arch, and from the gill arch comes a conjunctival tube, which is bifurcated at the tip and is attached to the vulvae of the female, with one bifurcation on each vulva.
COMMENTS. In his original description of this species, Wilson (1935) wrote that his material consisted of 'four females, two with egg strings and two with attached males'. However, of the four USNM type specimens, I have found that one of the two females without "egg strings" is an immature adult (only 0.93 mm long) and the other is a slightly more mature specimen with eggs still inside. his trunk. Only one of the two egg-bearing females carried a pygmy male; the other female's missing male was probably removed by Wilson. A systematic description of parasitic Copepoda found on fish, listing the known species.
Proceedings of the General Meetings for Scientific Business of the Zoological Society of London, plates, 1-3. Tenth Annual Report of the Fishery Board for Scotland, Part III, Scientific Investigations, pages 244-272, plates 7-13. Eighteenth Annual Report of the Fishery Board for Scotland, Part HI, Scientific Investigations, pages 144-188, plates 5-8.
A catalog of terrestrial, freshwater and marine crustaceans found in the catchment of the River Forth and its estuary. Twenty-sixth Annual Report of the Fishery Board for Scotland, Part III, Scientific Investigations, pages 73-92, Plate 3. North American Parasitic Copepods: A List of Those Found on the Fishes of the Pacific Coast, with Description of New Genera and Species.
Index
Publication in Smithsonian Contributions to Zoology
