404 Mr. Gray's Monograph on the Cypraiidce. 



margin; spire covered ; margin very much thickened and extended, 

 rounded at the edges, forming a kind of smooth polished wall 

 round the back, the height of which it often exceeds, greyish 

 white ; the base whitej polished, rather convex ; the mouth rather 

 broad ; teeth extended partly over the base, giving it a ribbed ap- 

 pearance, those of the inner lip larger, distant, those of the outer 

 smaller, closer ; columella smooth ; inside purple. Axis ^L, dia- 

 meter -jL of an inch. 



When this shell is not quite full grown, the edge is rather de- 

 pressed and it has somewhat the form of C. annulus ; but the out- 

 line and edge are more rounded, in which state it is in the collec- 

 tion of my excellent friend, Mrs. M. A. Mauger. In the cabinet 

 of Mrs. Mawe, there is two specimens, which appear by their 

 teeth to belong to this species, of a fine deep yellow colour. 



62. Cyprcea annulus. — The Ringed Cowry. 



Testa ovata, scutellata, luteo-albida, dorso linea flava irregu- 

 lar! circumdato ; marginibusincrassatis, rotundatis, depressis, laev- 

 ibus; subtus planiusculis ; dentibus laevibus equalibus. 



Cyprasa annulus. Lin. Sys. Nat. 1179. Martini, j. 336. 

 Born. Mus. 187. Schroeter Einl.j. 121. Gmelin 3415. Schrev- 

 ber's Conch. 73. Lamarck Ann. Mus. xvi. 121, Hist. vii. 402. 

 Dillwyn R. S. 459. 



Icon. Bonanni. Rec. $f Kirch iil. f. 240, 241. Rumphius, 



t. 39. f- D. Pet. Amb. Gaz. t. 668. Gaulter t. 14. f. 1,2. 



Knorr. iv. t. 9, f. 4. Martini}, t. 24. f. 239, 240. Ency. Me- 

 thod. t. 336. f. 7. 



2. Incompleta. Testa albida, obscure caeruleo trifasciata. 



3. Decorticata. Testa caerulea, marginibus albis. 



Inhabits Indian Seas. Amboyna. Rumphius. Alexandria, 

 Linnceus. East Indies, Humphreys. Mollusca, Lamarck. 



Shell ovate, yellowish white, or white, the back convex, sur- 

 rounded with an irregular yellow line; spire concealed; margin 

 thickened, depressed, rounded at the edge, smooth, polished, ex- 

 tended on each side into a slight tubercle ; the base polished, flat- 

 tish; the mouth is rather broad ; the teeth very slightly extended 

 over the base, nearly of equal size, those of the inner lip being only 



