344 



Mr. H. A. Bay lis on 



1828; Schneider, 1866; Hall, 1916) are not only incom- 

 plete, but in some respects incorrect. The only recent 

 account — that of Hall — is not based on a re-examination of 

 the animal, but embodies, in an English version, the original 



AIO& 



Ch! 



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 the 

 "gizzard"; D., dorsal lip ; F., fimbriae ; M.Oes., muscular wall of 

 oesophagus ; P., paired papilla of dorsal lip ; T., base of dorsal tooth 

 of the " gizzard " ; V., ventro-lateral lip. 



Latin characterization of Hemprich and Ehrenberg and the 

 German description of Schneider. The only figures existing 

 appear to be those of Schneider (1866, text-tig., p. 40, and 

 pi. ii. figs. 1 & 2). Copies of these are reproduced by Jlall. 



