164 



POPULAR CONCHOLOGY. 



of being entirely retracted into the shell ; its head broad 

 and short, flanked by two distant triangular tentacula, and 

 bearing two immersed eyes some way above their bases ; 

 tongue broad, armed, axile denticle, broadly quadrate, 

 with its upper edge inflected and serrulate ; flanked on 

 each side by a single hamate lateral with a broad base ; 

 no gizzard ; foot broad, truncate, and sub-bilobed in front, 

 shorter than the shell, and unequally bilobed behind.* — 

 Several species. 



Forbes mentions one British species, A. hyalina, which 

 is also found on the coast of Norway. Philippi includes 

 A. globosa of Loven, and Utriculus pellucidus of Brown. 



Bullinula. Beck. — Shell oval, obliquely striped, 

 with convex whorls ; aperture large ; spire slightly pro- 

 duced and conical. Animal, with a circular head, on each 

 side lengthened into a blunt horizontal projecting ten- 

 tacula, and two rather long oval lobes projecting from 

 them, which are thrown backwards over the shell; the 

 foot is very large, longer and broader than the shell. — 

 3 species, f 



Philippi mentions Bulla undata Brug., and B. scabra 

 Chem. (not Miill.), as belonging to this genus. 



Bulla. Lin. — Shell rolled up, long, egg-shaped ; 

 apex truncated, and umbilicated; aperture 

 extending the whole length of the shell, 

 and sometimes very open. Animal, bulky, 

 partially investing but not covering the 

 shell; capital lobe large, truncated in front, 

 bilobed posteally, furnished with immersed 

 eyes (except in B. cranchii) towards the 

 centre of the disk ; lateral lobes very large, 



Forbes' s British Moll. 



t Sowerbv's Thes. Conch. 



