154 



a very natural family with the Fyramidella, and^ so far as the shell is 

 concerned, agree in character, though differing materially in their plan of 

 convolution. Among the few species known, the T. coccinata of the Phi- 

 lippine Islands is the rarest and at the same time the prettiest ; the T.flam- 

 mea, solidida, virgata, glabra, nitidula, insculpta and ori/za are all from 

 the same locality. To these may be added T. Siebaldii from Japan, T. ve- 

 nusta. from Peru, T. tessellata from the Eed Sea, and the T.fasciata of 

 our own southern shores. 



1. auricula, ifflw. 



2. bullata, Kiener. 



3. coccinata, Reeve. 



4. fasciata. Lam. 



5. flammea, id. 



6. glabra, Reeve. 



Species. 



7. insculpta, Reeve. 



8. nitidula. Lam. 



9. oryza. Reeve. 



10. pedipes, Lam. 



11. pmictata, JPerussac. 



12. Siebaldii, Reeve. 



13. solidula. Lam. 



14. tesseUata, Reeve. 



15. venusta, B'Orbigny. 



16. virgata, Reeve. 



Figure. 



ToRNATELLA COCCINATA. PI. 14. Pig. 72. Shell, showing its compressly 

 convoluted growth, strongly plaited columella, and oblong aperture. — 

 From Mr. Cuming's collection. 



Family 9. lANTHINEA. 

 Genus lANTHINA, Lamarck. 



Animal ; head large, prolonged into a short swollen proboscis, 

 having a perpendictdar mouth, the lips of which are thickened 

 and furnished with prickly hooks or plates ; above the neck 

 on each side is a pair of tentacles of unequal length, the front 

 one being the shorter, at the outer base of which is situated 

 a very small indistinct eye ; foot short, having attached to 

 its under surface a broad fin-like appendage with a float of 

 vesicles. 



Shell; globose, turbiniform, thin and brittle, with the whorls 

 either rounded or inclined to angular at the periphery ; colu- 

 mella long and straight, margin of the aperture thin, never 

 reflected. 



The lanthina or Sea-Snail constitutes a type of which there is httle 

 approximation in any of the pectinibranchiate genera, though possessing 

 the essential characters of the order. It might be treated rather as the 



