384 MR. H. ADAMS ON NEW SHELLS. [NoV. 26, 



nigro-olivacea induta ; spira ovato-conica, apice decollato ; 

 anfractibus A\, coiwexiusculis, ad suturam costis munitis, ultimo 

 longiore, testae dimidiam pauIo super ante ; apertura oblongo- 

 ovata ; labio polito, subcalloso ; labro 7nargine simplice, intus 

 tenuiter incrassato. 

 Long. 9 ; lat. 5 lin. 

 Hab. Malacca. 



Shell orate, rather solid, transversely striated, covered with a dark- 

 olive epidermis ; spire ovately conical, apex decollated ; whorls 4^, 

 slightly convex, furnished with an obsolete ridge at the sutures, the 

 last rather more than half the length of the shell ; aperture oblong- 

 ovate ; inner Up smooth, somewhat callous ; outer lip with the margin 

 simple, slightly thickened within. 



This species differs from the type, C. nigricans, in being smaller 

 and less solid, and in having the spire shorter, with the sutural rib 

 almost obsolete. 



Genus. Canidia, H. Adams. 



Operculum parvum, unguiculatum, corneum ; 7iucleo tnarginali, 



rostro basali elevato munito. 

 Testa fusiformis ; spira longiore quam apertura, apice eroso ; 



anfractibus convexiusculis,' trayisversim plicatis ; apertura 



elongato-ovata, antice valde emarginata ; columella truncata, 



subrecta ; labro simplici, antice sinuato. 



Operculum small, unguiculate, horny, the nucleus marginal and 

 furnished with an elevated process behind. 



Shell fusiform ; spire longer than the aperture, apex eroded ; 

 whorls slightly convex, transversely plicate ; aperture elongately 

 ovate, with a distinct notch in front ; columella truncate, nearly 

 straight ; outer lip simple, with a sinus at the fore part. 



This genus is nearly alUed to Clea, but differs from it in the colu- 

 mella being nearly straight, and in there being a sinus in the fore 

 part of the outer hp. The distinct notch in front and the operculum 

 distinguish it from Hemisinus, and the operculum from Melanopsis. 

 The operculum is similar to that of a shell from Travancore lately 

 described by Mr. Benson as a species of Clea. The operculum of 

 the typical Clea nigricans I have not had an opportunity of ob- 

 serving. Melanopsis helena, from Java, is a second species of 

 Canidia. 



Canidia fusca, H. Adams. 



C. testa elongata, tenui, radiatim plicata, plicis sulcisque striatis, 

 epidermide pallide fusca ; spira elevata, apice eroso, sutura 

 impressa ; anfractibus 7, convexiusculis, prope suturam costis 

 tenuibus, ultimo dimidium testcB vix cequante, et ad basin sul- 

 cata ; apertura oblongo-ovata, intus alba ; columella polita, 

 subcallosa. 



Long. 10; lat. 4| lin. 



Hab. Camboja. 



