508 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XI. 



partes anfractuum bino ordine similari instructis, aperture subquadrata, labro 

 tenui. Long. 4, lat. 1*15 mm. 



Seven specimens, mostly rather imperfect. The largest, from which this 

 description is taken, is slightly distorted in one of the central whorls ; it is in 

 very good condition, being white, elongated, very attenuate, thirteen-whorled, 

 ornamented with three rows of gemmules, one row being at the canaliculate 

 depression, just below the sutures of each whorl, the other two on the normal 

 whorl. The mouth is simple, aperture squarrose. It is a very beautiful 

 little species. 



5. Solarium (Torinia) homalaxis, n. sp. PI. Fig. 12. 



S. testa minutissima, depressa, profunde umbilicata, albescente, gemmu- 

 lata, supra depresso-planata, anfractibus 4, ultimo rapide accrescente, ad 

 peripheriam bicarinato, carinis regulari gemmarum ordine decoratis, simili 

 bino ordine circa umbilicum, inter has, infra, simul ac supra, quatuor mino- 

 rum gemmularum ordinibus instructis, apertura quadrato-rotunda. Long. 

 1, lat. 2 mm. 



I alluded to this specimen when describing its congener, S. deleetabile, also 

 from the same locality.* This species differs in its more depressed form, the 

 bicarinate angles at the periphery, and its smaller size. The shell is in juve- 

 nile condition, however, and may grow slightly larger, the apical whorls 

 showing this. It is an exceedingly highly chased and sculptured little 

 Bpecies. 



6. Rissoina epextroha, n. sp. PI. Fig. 23. 



R. testa oveta, gradata, solidiuscula, Candida, anfractibus 5, undique longi- 

 jkudinaliter crassicogtatis, costis hevibus, interstitiis transversim ttenuistriatis, 

 apertura ovata, labro exteriore incrassato. Long. 2, lat. 1*15 mm. 



Three specimens, one being juvenile, of a highly sculptured little species, 

 which I have placed in Rissoina rather than in Rissoia, owing to the thickened 

 base of the aperture, the general form being more in accordance with a spe- 

 cies of the latter genus. 



The shell is gradately turre ted, five whorled, the whorls being uniformly 

 costate, the ribs very thick in proportion to the size of the shell, and the 

 interstices between transversely finely striate. The name, from the Greek 

 ivivrpn/Ad, signifying " a delicacy," is chosen on account of the extreme 

 beauty of this little Rissoina. 



7. Ressoina pachv/stoma, n. sp. PI. Fig. 4. 



R. testa solida, fusiformi, albo-cinerea, anfractibus 8, undique longitu- 

 dinaliter recticostatis, costis regularibus, lsevibus, nitentibus, interstitis 

 jujvibus, apertura oblique ovata, labro exteriore multum incrassato, ad basim 

 quasi-truncato, margine columellari obliquo, crasso. Long. 5, lat. 2 mm. 



The nearest approach to this species seems to be R. conifera (Schwartz). 

 It, is principally distinguishable by its straight, smooth ribs, and extremely 



* Mem. ^anch. Lit. and Phil, Soc, vol. vii, p. 57. 



