4 



grooved; anterior side rounded, posterior rather beaked, 

 angular : dorsal posterior area not grooved ; length 

 0-5, breadth 0-2, height 0-3. The only specimen I 

 have, seen %vas brought from Melville Island in 1824, 

 by Captain Parry. 



13 costellata nobis, Z. P. 1832, Dec. Conch, lliustr. f. 8. 



Panama. Mr. Cuming, 



14 gibbosa nobis, Z. P. 1832, Dec. Conch. lUustv. f. 9. Gulf 



of Nocoiyo. Mr. Cuming. 



15 eburnea nobis, Z. P. 1832, Dec. Conch Illustr. f. 10. Bay 



of Caraccas. Mr. Cuming, 



16 polita nobis, Z. P. 1832, Dec. Conch. Illustr. f. 11. 



Panama. Mr. Cuming. 



17 nasuta, 7Jo6w, Conch. Illustr. f. 12. Shell oblong, white, 



very finely longitudinally striated ; anterior side rather 

 shorter than the posterior, rouiided ; posterior acumi- 

 nated, slightly turned upwards, with an elongated 

 longitudinally striated dorsal area : length 0-8, breadth 

 0-33, height 0.4. From the East Indies. G. Humphrey. 



18 Fabula, nobis. Conch. Illustr. f. 13. Shell ovate, white, 



obliquely striated, nearly equilateral, anterior side 

 rounded, posterior acuminated, slightly turned upwards, 

 with two ridges passing from the umbones to the 

 acuminated extremity, the upper of which is crenated, 

 forming a dorsal posterior area : length 0-4, breadth 

 0.15, height 25. 



19 Elenensis nobis, Z. P. 1832, Dec. Conch. Illustr. f. 14. 



St. Elena, Mr. Cuming. 



20 cuneata nobis, Z. P. 1832, Dec. Conch. Illustr. f. 15. 



Valparaiso. Mr. Cuming. 



21 striata TJofeiJ, Conch. Illustr. f. 16. Shell ovate, white, 



concentrically striated, nearly equilateral, anterior and 

 posterior dorsal slopes nearly equal ; anterior side 

 slightly acuminated, rounded ; posterior side acumina- 

 ted, with an indistinct dorsal area: length 55, breadth 

 3, height 4. From China, G. Humphrey. 



