GASTEROPODA. 



245 



Synonym, Chenopus, Philippi. 



Type, A. pes-pelecani. PL lY., Fig. 7, and Fig. 99. 



Shell ydila an elongated spire ; whorls numerous, tubercnlated; 

 aperture narrow, with a short canal in front ; outer lip of the 

 adult expanded and lobed oi digitated; operculum pointed, 

 lamellar. 



Animal with a short broad muzzle; tentacles cylindrical^ 

 bearing the eyes on prominences near their bases, outside ; 

 foot short, angular in front ; branchial plume single, long ; 



Fig. 99.* 



lingual ribbon linear; teeth single, hooked, denticulated; 

 uncini 3, the first transverse, 2 and 3 claw-shaped (Fig. 100). 

 The dentition oi Aporrhais is most like Sfromhus and Cariiiaria ; 

 and quite unlike the Oerithiadce with which it has been placed, 



Fig. 100. Aporrhats pes-pelecani. (Warington.) 



in accordance with the views of Professor Forbes. The animal 

 is carnivorous. 



Distribution, 4 species. Labrador, Norway, Britain, Mediter- 

 ranear, West Africa. Ptange 100 fathoms. 



Fossil; see Pteroceras and Rostellaria ; above 200 species, 

 ranging from the lias to the chalk, probably belong to this 

 genus, or to genera not yet constituted. 



* Fig. 99. Aporrhais pes-pelcam, L,, from a drawing by Josliua Alder, Esq., in th« 

 " British Mollusca." 



