Zoological Society. 223 



liratd, interstitiis decrissate striatis ; aperturd transversa, sub- 



ovali, intus porcelland, labia subrecto, calloso. 

 Eab. ad Insulam Lord Hood, dedicav. (Mus. Cuming.) 

 A species somewhat resembling in colouring the striped variety ot 

 S. notata, but which differs materially in form and sculpture. 



Microtis, new genus. 



Animal as in Stomatia, but the foot with a deep anterior fissure 

 for the head, and the front edge bilobed. Operculum none. Shell 

 spiral, suborbicular, depressed, with two tuberculated ndges ; spire 

 slightly prominent ; aperture very large, wider than long, pearly 

 within, columellar margin spiral, visible as far as the apex of the 

 spire. 



Microtis tuberculata, Adams. M. testd suborbiculari, halio- 

 tided, valde depressd, viride variegatd, transversim striatd, bi- 

 carinatd, carinis tuberculatis, prope suturam nodulosim plicatd; 

 spird vix elevatd, anfractibus carinatis ; aperturd magnd, ovali, 

 intu^ bisulcatd margaritaced. 

 Eab. Island of Capul, on the sands, high water ; H. C. (Mus. 



Cuming.) 



Gena, Gray. 



Animal subspiral, oval, depressed, too large to enter the shell; 

 tentacular lobes plumose. Foot very large, tubercular, posteriorly pro- 

 duced ; lateral membrane not fimbriated, more or less extended, and 

 covering the shell. Operculum none. Shell subspiral, oblong, ear- 

 shaped, depressed, smooth or striated ; spire flattened, nearly obso- 

 lete ; aperture large, pearly within. 



Gena planulata, Lamarck. 



Hab. Isle of Camaguin, under smooth stones, low water ; Gmdul- 

 man, isle of Bohol, under stones ; H. C. (Mus. Cuming.) 



Stomatella planulata, Lamarck, Hist. An. s. Vert. vol. vi. p. 210 ; 

 Encyclop. M6th. pi. 40. f. 4 a, b. 



Gena auricula, Lamarck. 



Hab. Eastern Seas ; Red Sea ; Celebes. (Mus. Cuming.) 



Stomatella auricula, Lamk. Hist. An. s. Vert. vi. p. 210. Patella 

 lutea, Linn. 



Gena nigra, Quoy and Gaimard. 



Hab. Eastern Seas. (Mus. Cuming.) 



Stomatella nigra, Quoy ^ Gaimard, Fay. de VAstr. v. 3. pi. && bis, 

 fig. 10-12. 



Gena plumbea, Adams. G. testd haliotided, ovato-oblongd, 

 dorso latere dextro gibbosd, sinistra planulatd, plumbed, decus- 

 sate totd striatd i spird prominuld, anfractibus rotundatis, 

 anfractu ultimo ad suturam gibboso ; aperturd postice subcana- 

 liculatd, labro in medio flexuoso. 



Hab. Java. (Mus. Cuming.) 



Gena strigosa, Adams. G. testd haliotided, ovato-oblongd. 



