841 



Kingdom, the name of this little genus might be changed to 3fi- 

 crotina, as there is a genus of grasses named Microtis by Robert 

 Brown. 



Microtis tdberculata (pi. clxxv. f. 45, 46, 4^1), A. Adams, 

 Pro. Zool. Soc. Feb. 1850. 



M. testa suborbiculari, haliotoidea, valde depressa, viride varie- 

 gata, transversim striata, bicarinata, carinis tuberculatis, prope 

 suturam nodulosim plicata; spira vix elevata, anfractibus carinatis; 

 apertura magna, ovali, intus bi-sulcata, margaritacea. 



The shell resembles a small imperforate HaMotis, and the colu- 

 mellar margin is visible as far as the apex of the spire, as in some 

 species of that genus. 



Island of Capul ; on the sands, high water. (Mus. Cuming.) 



Genus STOMATIA, Helbling. 



Animal spiral, too large entirely to enter the shell ; tentacular 

 frontal lobes digitated ; foot large, fleshy, tubercular, greatly pro- 

 duced posteriorly; lateral membrane fringed, ending anteriorly, 

 on the left side, in a fimbriated crest under the eye-pedicel, and 

 on the right, in a slightly-projecting fold, or gutter, leading to the 

 respiratory cavity. 



Operculum none. 



Shell subspiral, oblong or suborbicular, carinated or tuber- 

 culated; spire prominent; aperture wider than long, perlaceous 

 within. 



Si/n, Stomax, Montfort ; Haliotoidea, Himphrei/ ; Sigaretus, 

 Schiim., not Lamarck or Ciiv. 



1. Stomatia phymotis (pi. clxxv. f. 48, 49, 50, 51, 52), 

 Helhlin, Privatg. 4, t. 2. f. 34, 35. HaHotis imperforata, Chem. 

 far. Stomatia Australis, A. Adams, Pro. Zool. Soc. Feb. 1850. 



S. testa haliotoidea, ovato-oblonga, dorso convexa, striata, no- 

 dulosa, argentea ; spira parvula, contorta ; labro tenui, acuto. 



Shell haUotoid, ovate-oblong, convex on the back, striated, no- 

 dulous, silvery ; spire small, contorted ; outer lip thin, acute. 



The Stomatella obscnrata of Lamarck, judging from the descrip- 

 tion, is a worn specimen of the above species. 



PhiKppiue Islands ; on the reefs. (Mus. Cuming.) 



2. Stomatia duplicata (pi. clxxv. f. 61, 62, 63), Sowerby 

 (Stomatella), Genera. 



