The annals and magazine of natural history : zoology, botany, and geology . Leptobaris picea, Faust, Stett. ent. Zeit. 1894, pp. 148 & 149. Sierra Leone. I have not succeeded in identifying this species, which, sofar as can be judged from Fausts very brief description,must resemble a dwarfed specimen of , Brancs. XXXV.—Crossophorus collaris, Hemprich & Ehrenberg, alittle-known Nematode Parasite of the Hyiax. By H. , (Published by permission of the Trustees of the British Museum.) An opportunity having recently occurred of examiningspecimens of this very curious and hi
The annals and magazine of natural history : zoology, botany, and geology . Leptobaris picea, Faust, Stett. ent. Zeit. 1894, pp. 148 & 149. Sierra Leone. I have not succeeded in identifying this species, which, sofar as can be judged from Fausts very brief description,must resemble a dwarfed specimen of , Brancs. XXXV.—Crossophorus collaris, Hemprich & Ehrenberg, alittle-known Nematode Parasite of the Hyiax. By H. , (Published by permission of the Trustees of the British Museum.) An opportunity having recently occurred of examiningspecimens of this very curious and highly specialized Ascaridfrom the hyrax {Procavia sp.), it seems desirable to describethe species in somewhat fuller detail than has hitherto beendone. The existing descriptions (Hemprich and Ehrenberg, 344 Mr. H. A. Bay lis on 1828; Schneider, 1866; Hall, 1916) are not only incom-plete, but in some respects incorrect. The only recentaccount—that of Hall—is not based on a re-examination ofthe animal, but embodies, in an English version, the original AIO&. Ch! 0 0 3 mm. Crossophorus collaris. Dorsal view of the anterior end. C, combs of teeth representing the dentigerous ridge on the lip;Ch., Ch., different portions of the chitinous apparatus of thegizzard; D., dorsal lip; F., fimbriae; , muscular wall ofoesophagus ; P., paired papilla of dorsal lip ; T., base of dorsal toothof the gizzard ; V., ventro-lateral lip. Latin characterization of Hemprich and Ehrenberg and theGerman description of Schneider. The only figures existingappear to be those of Schneider (1866, text-tig., p. 40, andpi. ii. figs. 1 & 2). Copies of these are reproduced by Jlall. Crossophorus collaris, Ilemprich cb Ehrenberg. 345 Crossophorus* collaris, Hemprich & Ehrenberg, Ascarisferox, Schneider, 1866. The general dimensions of the worm are :—length, male,up to 65 mm., female 55 to 90 mm. Maximum thickness1*3 mm. in the male, about 2 mm. in the largest female. The head measures 044—0
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