818 MANUAL OP THE MOLLUSCA. 



Distribution, 1 species. United States, Norway, Britain, 

 Borneo, Mexico. 



BuccmTJLTJS, Blancliard. 



Shell tliick ; columella with two plaits ; aperture small, entire 

 in front. 



Distribution, 10 species. South Seas. 



Apltjstrum, Schumacher. 



Tijpe, BuUa aplustre, PI. XIV., Fig. 11. 



Etymology, aplustre, a ship's flag. 



Synonyms, Bullina, Fer. Hydatina (physis), Schum. Bullinula 

 (scabra), Beck. 



Shell oval, ventricose, highly coloured; spire wide, depressed; 

 aperture truncated in front ; outer lip sharp. 



Animal with a very large foot, extending beyond the shell all 

 round, and capable of enveloping it ; a posterior lobe reflected 

 on the spire ; mantle not investing ; tentacular lobes large, oval, 

 ear-shaped ; labial tentacles four ; eyes small, black, sessile at 

 the inner bases of the tentacles ; lingual teeth [B. physis) 

 13.0.13, serrated. 



Distribution, 10 species. United States, West Indies, Mauri- 

 tius, Ceylon, China, Australia. 



ScAPHAmDER, Montfort. 



Type, S. lignarius, PL XIY., Fig. 12. 



Etymology, scaphe, boat, aner, man. 



Shell oblong, convolute ; spirally striated ; apertui'e much 

 expanded in fi'ont ; spire concealed ; epidermis thick ; lingual 

 teeth 1.0.1, crested. 



Animal with a large oblong head, destitute of eyes; foot 

 short and broad ; lateral lobes reflected, but not enveloping the 

 shell ; gizzard with two large trigonal plates and a small nari'ow 

 transverse plate (Fig. 17). It feeds on Dentalium entale. 



Distribution, 13 species. United States, Norway, Britain, 

 Mediterranean on sandy ground ; 50 fathoms. 



Fossil, 8 species. Eocene — . Britain, France. 



Philine (Ascanius, 1762). 



Type, B. aperta, PI. XIY., Fig. 13. 

 Synonym. Bullsea. Lamarck. 



Shell internal, white, translucent, oval, slightly convoluted, 

 epire rudimentary. 

 Animal pale, slug-like ; mantle investing the ehell ; Kead 



