28 



Figures 



Emarginula fissurata. PI. 23. Pig. 132. Shell, showing externally a 



small fissure at the upper front margin. 

 Emarginula (Cemoria) Noaciiina. PL 23. Pig. 133. Shell, showing 



the diamond-shaped fissure behind the incurved vertex. 



Genus S. PARMOPHORUS, Be Blainville. 



Animal ; body thick and fleshy, having a white oblong shield-like 



shell upon its back, partially covered by a fold of the mantle ; 



head ivilh an elongated muzzle, and a pair of thick prominent 



tentacles, with eyes at their outer bases. 

 Shell ; oblong, convexly depressed, shield-like, faintly cmarginaied 



in front, white, vertex minutely recurved. 



Parmophorus, both animal and shell, though much larger, is closely allied 

 to Emarginula, but the soft parts are more fleshy in comparison, and the 

 shell is partially covered in by a fold of the mantle. All the Parmophorus 

 shells are of an oblong shield shape, and of a peculiar white composition. 

 As in Emarginula, they are sinuated at the front edge, but the sinus is very 

 superficial ; it never amounts to a fissure, and in some specimens is 

 scarcely discernible. The animal, so far as may be gathered by MM. 

 Quoy and Gaimard's figure of P. australis, is jet-black, presenting a strik- 

 ing contrast with the shell. It inhabits shallow water where collected by 

 Mr. Cuming at the Philippine Islands, and is found also on the shores of 

 Australia and New Zealand. 



1. angustatus, Adams. 



2. Australis, Blainv. 



3. carinatus, Adams. 



4. cicatrieosus, id. 



5. cinereus, Gould. 



6. comiffatus, Reeve. 



Species. 



7. decussatus, Adams. 



8. elegans, Gray. 



9. elongatus, Lam. 

 10. granulatus, Blainv. 



12. intermedins, Reeve. 



13. osseus, Gould. 



14. radiatus, Adams. 



15. tumidus, Quoy. 



11. imbricatus, Quoy. 16. unguis, Linn. 



Figures. 



Parmophorus Australis. PL M. Pig. 2. Animal, with the shell en- 

 closed within a fold of the mantle. — From the ' Voyage de I' Astrolabe.' 



