STROMBIDiB, 193 



is longer than the other) from the notch in front of the shell ; 

 it will thus remain perfectly immovable until assured of security, 

 when it begins to roll over and examine the ground with its 

 rostrum. 



TEREBELLOPSis, Ley merle. Spire very long. A single French 

 nummulitic fossil. T. Braunii^ Lej^m. (Ix, 81). 



Aporrhais, Dillw. 



Etyvi. — Spout-shell, from aporrheo, to flow away. 



Syn. — Chenopus, Phil. 



Bistr. — 4 recent sp. W. Africa, Mediterranean, boreal 

 Europe and America. Range, 100 fathoms. Fossil. Lias — . 

 A. pes-pelecani, Lam. (lix, 67). 



Animal with elongated, tapering muzzle ; tentacles subulate, 

 with eyes at their outer bases ; mantle with outer side expanded, 

 lobed, and with a rudimentary sijDhon in front, bending to the 

 right ; foot small, oblong, simple. Operculum lamellar, ovate or 

 pointed, nucleus small, apical. 



Shell fusiform, turreted or oblong-ovate, with a short canal in 

 front and a posterior canal running up the spire ; outer lip of 

 the adult expanded and 2-3 digitated, the digitations forming 

 carinse on the back of the shell. The rostriform head, sessile 

 eyes and rudimentary siphon, together with certain peculiarities 

 of the shell, have been supposed to indicate strong affinities 

 with the Cerithiidse ; but that these moUusks are most closely 

 related to the Strombs (which they certainly resemble in den- 

 tition) is scarcely doubtful. 



Ghiropteron aemilunare is probably a larval Aporrhais. 



On the authority for the generic name, see Gabb, Am. Jour. 

 Conch. ^ iv, 143. 



GONiocHEiLA, Gabb. (Alipes, Conr.) Shell with posterior 

 canal extending about half-way up the spire, and not free at the 

 end; expanded outer lip with only one projecting angular 

 process, but bearing one or more external carinse in front of 

 this that do not terminate in marginal digitations ; canal short 

 and strongly incurved; inner lip thick. A. liratus, Conr. ( Ix, 82). 



ARRHOGEs, Gabb. (Monocuphus, Piette. Perissoptera, in part, 

 Tate.) Shell with expanded lip, merely terminating in a single 

 posterior obtuse lobe-like extension, and having its anterior sinus 

 nearly or quite obsolete ; posterior canal very short ; anterior 

 canal also short and obtuse. Bostellaria occidentalism Beck (^lix, 

 68 ■', the only species (recent). 



CYPHOSOLENUS, Piette, 18*76. Shell turreted, fusiform, with 

 longitudinal ribs and numerous revolving riblets ; last whorl 

 with a pair of tuberculate carinae, forming two digitations ; wing 

 subpalmate, tridactylous, not sinuous, the digitations long ; 



