DesGfijptioii of Two New Species of the Genus Batissa. 113 



sulcis remotis, nmbonibus profuiule crosis ; dentibus cardinalibus tribus, 

 subfequalibus, caniculatis ; lateralibus elongatis, angustis, subsequalibus, 

 serrulatis. 



Long, 3 Jj, lat, 2|, diam. 1^ inches. 



Hob. — Nicobar. Collect, anctoris. 



This species, of which I received one specimen through Mr. 

 Bernardi of Paris, is somewhat like the JB. Kerandrenia, but 

 is less inflated, and posteriorly less elongated. 



List of the Jcnown /Species. 



BATISSA GRAY. 



Synonymy of the Genus. 



Cyprina and Cyclas Brug. 1792. — Cyrena Larak. 1818. — Batissa 



Gray, 1854. 



Siyecies. 



1. atrata Desh. Proc Zool. XXII. 14, 1854. 



Hah. ? 



3. AustralBS I>e!«il]l. Loc. sup. cit. XXII. 346, 1854. 

 Hob. Australia. 



3. ChildrenaB Adaeois Rec. Gen. 2, 448, 1858. 



Cyprina Islandica Brug. Encycl. meth. pi. 301, f. 1, 1792. 

 Ectb. Phil. Islds. 



4. coBiipressa Priwie Proc. Zool. XXVIII. i860. 

 Ilah. Borneo. 



5. corbicilloides Dcsh. Proc. Zool. XXII. 14, 1854. 

 Hob. ]Sr. Guinea. 



6. elong^ata Pr. Proc. Zool. XXVIII. i860. 

 Hob. N. Caledonia. 



— eximia Ads. rec. gen. 2, 445, 1858. — Cyrena eximia Dunker. 



7. fortis Pr. Proc. Zool. XXVIII. 1860. 

 Hab. N. Caledonia. 



