cypRjEA. 441 



stercoraria. 7. Shell ovate, gibbous, livid with 

 reddish spots, marginated on both sides, and 

 flat beneath. 



Cypraea stercoraria. Lin. Syst. Nat. p. 1174. Born Mm. 



p. 175. t. 8. f. 1. Schroeter Einl. i. p. 99- t. 1. f. 5. 



Gmelin, p. 3399. Schreibers Conch, i. p. 55. Chemnitz, 



xi. p. 36. t. 180. f. 1739 and 1740. Lamarck in Ann. 



du Mm. xv. p. 45 1 . 

 Cypraea olivacea. Gmelin, p. 3408. 

 Cypraea conspurcata. Gmelin, p. 3405. Schreibers Conch, 



i. p. 60. 

 Cypraea nebulosa. Gmelin, p. 3413. ? 

 Cypraea, No. 107- Schroeter Einl. i. p. 160. 

 Cypraea Rattus. Lamarck in Ann. du Mm. xv. p. 451. 

 Porcellana Gibber. Mm. Gevers. p. 406. 

 Lister Conch, t. 687- f. 34. Knorr, iv. t. 13. f. 1. Martini, 



i. t. 31. f. 332. Erie. Method, t. 354. f. 5, and t. 351. 



f. 1. 

 Junior. Cypraea fasciata. Chemnitz, x. p. 100. t. 144. f. 



1334. Gmelin, p. 3406. Schreibers Conch, i. p. 6l. 

 Cypraea gibba. Gmelin, p. 3403. 

 Lister Conch, t. 663. f. 7. 

 Inhabits Jamaica. Lister. Coast of Guinea, frequent. Schroe- 

 ter. 

 Shell about three inches long, and two broad, with the back 

 gibbous and much elevated in proportion to its size ; colour 

 light greenish brown, or livid with dull rather obsolete rufous 

 spots, and a large ferruginous mark near the spire. Some 

 shells are without any, or with only a small protuberance on 

 the back, and these have been arranged separately by La- 

 marck with the name of C. Rattus, but they appear to me to 

 be the same species in a different stage of growth, or at most 

 only a Variety. Young shells are of a bluish colour on the 

 back with lighter bands. Born has figured a shell with a la- 

 teral mammiform tubercle which seems to be a Lusus of 

 this species, and Chemnitz's figures 1332 and 1333, most 

 probably represent other accidental Varieties. Martini's 

 figure 332, is far from good, but the description leaves no 

 doubt that it was intended for this species. 



aurora. 8. Shell ovate, ventricose, orange, with a 

 white unspotted margin and base; teeth 

 orange. 



