STROMBIDA. 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, Leymerie. Spire very long. A single French 
nummulitic fossil. TZ. Braunii, Leym. (Lx, 81). 
Avorruats, Dillw. 
Etym.—Spout-shell, from aporrheo, to flow away. 
Syn.—Chenopus, Phil. 
Distr. — 4 recent sp. W. Africa, Mediterranean, boreal 
Hurope 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 siphon 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 
carinz 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 aftlinities 
with the Cerithiide ; but that these mollusks are most closely 
related to the Strombs (which they certainly resemble in den- 
tition) is scarcely doubtful. 
Chiropteron semilunare 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 carine in front of 
this that do not terminate in marginal digitations ; canal short 
and strongly incurved; inner lip thick. A. /iratus, Conr. (1x, 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. Rostellaria occidentalis, Beck (lix, 
68 , the only species (recent), 
CYPHOSOLENUS, Piette, 1876. Shell turreted, fusiform, with 
longitudinal ribs and numerous revolving riblets; last whorl 
with a pair of tuberculate carinz, forming two digitations ; wing 
subpalmate, tridactylous, not sinuous, the digitations long; 
