GASTEROrOBA. 245 



Synonym, Clienopus, Philippi. 



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



Shell Mdth. an elongated spire ; whorls numerous, tuberculated ; 

 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 ; 



lingual ribbon linear ; teeth single, hooked, denticulated ; 

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

 The dentition of Aporrhais is most like Stromhus and Carinaria ; 

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



Fig. 100. Aporrhais pcs-pelecani. (Warington.) 



in accordance with the views of Professor Forbes. The animal 

 is carnivorous. 



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

 ranear, West Africa. Eange 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. Apnrrha'is pes-pelcani, L., from a drawing by Joshua Alder, Esq., in the 

 " British MoUusca." 



