126 Mr. A. Adams 07i new species of Sinusigera. 



Hah. China Sea. Gregarious. Captured at the surface in 

 the towing-net. This is the smallest species I have yet met 

 with, and is very different in form from the others. 



2. Sinusigera trochuides, A. Adams. 



S. testa trochoidea, albida; spira brevi, conica; anfractibus 3-4 plani- 

 usculis, ultimo lineis longitudinalibus undidatis ornato, ad peri- 

 pheriam angulato et carina filiformi circumcincto ; labio arcuato, 

 antice excurvato, ad terminationem truncate et emarginato ; labro 

 mareine incrassato, valde siuuato et bilobato, lobo antico valde 

 producto, subspmoso. 



Hub. ill Oceano Indico. 



Shell somewhat top-shaped, whitish, thin; spire short and 

 conical ; whorls 3-4, rather flattened, the last adorned with fine, 

 wavy, longitudinal lines, and anguiated at the periphery, en- 

 circled also with a filiform keel ; inner lip arched, curved out- 

 wards in front, and with the fore part truncate and emarginate ; 

 outer lip with the margin thickened and deeply sinuated and 

 bilobed; the anterior lobe greatly produced, and somewhat 

 spinose. 



Hab. Indian Ocean. A single specimen only of this peculiar 

 species was obtained in the towing-net. 



3. Sinusigera glabra, A. Adams. 



S. testa ovato-conica, glabra, nitida, rufo-fusca ; spira aperturain 

 gequante; anfractibus 3|, convexiusculis, ultimo vix angulato, carina 

 filiformi circumcincto ; labio regulariter arcuato, antice truncate ; 

 labro margine incrassato, valde sinuato et bilobato, lobo postico 

 niajori, truncato ; lateribus productis, lobo antico minori et truncato. 

 Hab. in Oceano Indico. 



Shell ovately conical, smooth, shining, reddish-brown ; spire 

 equaUing the aperture in length ; whorls 3^, rather convex, the 

 last encircled with a filiform keel ; inner lip regularly arched 

 and truncate anteriorly; outer hp with the margin thickened, 

 deeply sinuated, and bilobed; the hind lobe the largest, with 

 the sides produced and truncate like a hammer; the anterior 

 lobe the smaller, simple, and obliquely truncate. 

 Hab. Indian Ocean. 



This species somewhat resembles S. Huxleyi, Forbes, but it is 

 much smaller and of a difierent shape. It is perhaps the 

 Stmthiolaria microscopica of Dr. Gray. It occurred sparingly, 

 but gregariously, and was taken by the towing-net at the 

 surface. I am, Gentlemen, 



Yours &c., 



Arthur Adams. 



