12 CYPR/EA. 



thraensis are generally considered sufficient to distin- 

 guish it from stolida. There are four specimens known of 

 the shell here named Irevidentata. In its dorsal aspect it re- 

 sembles some incompletely coloured specimens of stolida, but 

 the teeth totally differ. Those of the latter are linear, co- 

 loured, numerous, and lengthened over the base. Those of 

 Irevidentata are short, rounded, and only about fourteen on 

 each side. Two of the specimens are from Borneo, and are 

 collected with C. stolida, varieties of which, rather marked 

 in colouring, are now had from Sandwich Islands, Ceylon, 

 Amboyna, Borneo, and New Caledonia ; the latter in the 

 laterally contracted and terminally produced form, recently 

 named G. Crossci, Marie. 



31. tessellata, Swain., (f. 99, 100, 101). — C. testa, crassa, 

 solida, lata, subcompressa, ovato-subquadrata ; lateribus in- 

 crassatis, maculis quadratis fuscis et albis tessellatis ; dorso 

 ferrugineo-subcinereo, ad latera maculis quatuor magnis 

 vividis nigro-castaneis ornato ; extremitatibus crassis, obtu- 

 sis, callosis, ad latera depressis, callo antico rotundato albo ; 

 basi incrassata, fusco alboque variegata, ; apertura angusta ; 

 dentibus liuearibus, castaneis. 



Note. — The brilliant specimens of two distinct varieties, 

 figured from the collections of Miss Saul and Mr. Dickin- 

 son, are believed to be the only ones known in a living state. 

 This shell, although standing alone in its combination of 

 characters, seems to have some affinity with stolida. 



A*. Group 2. More or less ovate, with dilated sides and 

 flat bases. 



32. ventricdlus, Lam., (f. 3, 4). — C. testa ovata, ponde- 

 rosa; lateribus expansis, subdepressis, extremitatibus obtu- 

 sis, basi subconcavo-depressa ; dorso casruleo, colore carneo 

 quadrifasciato ; lateribus subcasruleis ad marginem dorsalem 

 castaneo-nigricanti fasciatis, basi et lateribus subtilissime 

 albo striatis ; dentibus parvis. 



Note. — The name Achatina was only in manuscript before 

 the publication of Lamarck's Ventriculus. 



33. carneola, Linn., (f. 11, 12, 13, 322).— C. testa, varietate 

 brevi incrassata, C. avenosee simillima, sed basi magis ro- 

 tunda ; labio haud excavato ; extremitate dorsali antica cal- 

 losa, postica valde emarginata ; dentorum interstitiis purpu- 

 reis; labii dentibus 24; vnriat testa majori, cylindrica, vivide 



