248 ]\Ir. E. A. Smith on MoUuscafrom the 



margaritacea ; labrum externum ad marginem acutum, intus 

 incrassatum ; columella incrassata, tiiberculo obliquo instructa ; 

 operculum iguotum. 

 Longit. 10 millim,, diam. maj. 10. 



Hab. Station 232, off South India, in 430 fath. 



To the naked eye this little species has an almost smooth 

 appearance. Under the lens, however, the first two or three 

 whorls are seen to be ornametited with three or four spiral 

 rounded ridges, which gradually fade away on the penulti- 

 mate whorl. The uppermost, however, is indicated upon this 

 and the last volution by an infra-sutural row of oblique 

 nodose plicae, from which flow the oblique more or less raised 

 lines of growth. Three out of the four specimens examined 

 have the body-whorl rounded at the periphery, but in the 

 fourth there is a slight angulation. 



27. Leptothyra delecta. 



Testa turbiuata, imperforata, albida, roseo-tincta, spiraliter lirata, 

 liris incrementi lineis sublamelliformibus obliquis subgranulatis ; 

 anfractus Q^, convexi, supra declives, ultimus autice leviter 

 dcsceudons, ad periplieriam rotundatus, iufra paulo planatus, liria 

 concentricis circiter 13, superioribus gracilioribus, instructus, in 

 medio callosus, albus ; apertura leviter obliqua, irregulariter 

 circularis ; columella incrassata, reflexa, obliqua, parum arcuata ; 

 labrum tenue. 



Diam. maj. 13 millim., min. 11 ; alt. 1-1|. 



Hah. Station 237, lat. 13° 17' N., long. 93° V E., off 

 Andaman Islands, 90 fath. 



The protoconch, consisting of a whorl and a half, is smooth 

 and scarcely raised above the next volution, so that a rather 

 obtuse apex is thus formed. The body-whorl has about 

 twenty lirje, seven above the middle and the rest beneath, the 

 penultimate and preceding wiiorl seven. The lines of growth 

 are closer together and less lamellated upon the spire, and 

 the lir£B more granose than those upon the body-whorl. The 

 ground-colour is whilisii, and this is varied with oblique 

 stripes of a rosy tint, this colour appearing only on the spiral 

 lira?, and not in the interstices between them. Operculum 

 unknown. 



The species, allied to L. amussitata, Gould, from Japan, is 

 larger, more elevated in the spire, of a different colour, and 

 remarkable for the lamellated lines of growth. 



28. Solariella oxycona. 

 Testa anguste umbilicata, elate conica, albida, submargaritacea ; 



