56 



POPULAR CONCHOLOGY. 



somewhat the character of the genus Ranella. — 3 species, 

 fossil. 



Philippi says that D'Orbigny formed this genus by the 

 union of three fossil shells — Ranella longispina, Murex 

 ro stellar if or mis, and Chenopus spinosus. 



Family 2. — APORRHAIDEA. 



The animals have the head prolonged into a long snout, 

 near the bottom of which are two long cylindrical ten- 

 tacula, with the eyes placed at the base ; the tongue has 

 in the middle a row of teeth, and on each side three rows 

 of hooks. The shell is spindle-shaped ; the aperture ends 

 below in a point, or is lengthened into a canal ; the outer 

 lip is thickened, or wing-shaped, in the adult. All the 

 genera are marine. 



Aporrhais. Da Costa. (Chenopus Phil.) — Shell, spire 

 rather long ; whorls tuberculated ; mouth 

 narrow, with a short canal; right lip ex- 

 panded, lobed, or fingered, in the adult ; 

 operculum small, pointed. Animal, with a 

 long muzzle ; tentacles cylindrical, bearing- 

 eyes or prominences near their external 

 bases ; mantle digitated, loose, with a rudi- 

 mentary siphon ; foot rather short, angular 

 in front, obtuse behind, not centrally 

 grooved ; operculigerous lobe simple ; branchial plume 

 single, long ; tongue linear, with a single median denticle, 

 and three uncini on each side, the second and third 

 elongated and simple.* — 3 species, also fossil. 



A. pes-pelicani, a British species, is found plentifully on 

 some of our coasts : the other species, A. occidentalis and 



* Forbes' British Moll. 



