106 CHRYSOSTOMA. 



is divided by Guilding into Chiton, Canthopleura, Phakellopleura, 

 Chitonellus and Cryptoconchus. Zool. Journ. xvn. p. 27. The 

 author of this manual has lately attempted a revision of this inter- 

 esting but neglected genus, and has given a catalogue of all the 

 species hitherto known, as far as they could be identified among 

 the confused mass of synonyms and descriptions to be found in 

 the works of various Conchological writers. This catalogue is to 

 be found in his Conchological Illustrations, and refers to figures 

 of 102 species, 92 of which are contained in parts 38 to 45, 

 and 159 to 176. 



CHITONELLUS, Lam. (From Chiton ) Separated by Lamarck 

 from Chiton, on account of the valves being placed at a greater 

 distance from each other, the soft integument of the animal in- 

 tervening. Fig. 228, C. striatus. Philippines. 



CHLOROSTOMA. Sw. A sub-genus of " Troch^ee/' Sw. 

 (Trochus) of which C. argyrostoma is given as an example. 

 Sw. Lard. Cyclop, p. 350. 



CHONDRUS. Hartmann. Abida, Leach. A genus formed for 

 the reception of Pupa secale, Drap. Pupa Juniperi, Montague, 

 which have plaits in the aperture. 



CHRYSOAR. Montf. Probably a species of Orthoceras. 



CHRYSODOMUS. Swains. "Distinguished from Fusus, by the com- 

 parative shortness of the basal channel, and the ventricose or en- 

 larged shape of the body whorl. The beautiful orange-mouthed 

 Whelk of England is a typical example ; and the few others now 

 known are all of a very large size, and chiefly found in Northern 

 Seas, where they represent the more elegant Fusi of tropical lati- 

 tudes; the outer lip is always thin and smooth," Sw. page 90, 

 paragraph 78, described at page 308. 



CHRYSOLUS. Montf. Polystomella, Bl. A genus of micro- 

 scopic Foraminifera. 



CHRYSOSTOMA. Sw. A genus of the family " Rotellinse," Sw. 

 Thus described " Shell turbinate ; the whorls few and convex ; 

 aperture effuse, round ; inner lip thickened just over, and almost 

 concealing the umbilicus. Nicobaricus, Martini, 182 fig. 1822 — 

 5." Sw. Lard. Cyclop. Malac. p. 327. 



