EULIMIDA. 299 
STREBLOCERAS, Carpenter, 1858. Shell not decollated, the per- 
manent nucleus lying in a plane perpendicular to the adult tube. 
C. cornuoides, Carp. 
PARASTROPHIA Folin. (Moreletia, Folin.) Nuclear whorls sub- 
spiral in one plane, as in the typical group, but persistent; tube 
inflated anteriorly. 
Famity EULIMID A. 
Animal having slender, subulate, simple tentacles, with eyes 
sessile at their outer bases; mantle enclosed, with rudimentary 
siphonal fold ; foot linguiform, produced in front. 
Shell turriculated or turbiniform, smooth, milk-white, polished ; 
aperture oval or rounded, sometimes angular in front ; columella 
without plications. Operculum, when present, corneous, sub- 
spiral. 
Kuuima, Bisso. 
' Htym.—EHulimia, ravenous hunger. 
Syn.—Pasithea, Lea (in part). 
Distr.—49 sp. Britain, Mediterranean, India, Australia, 
Pacific. In 5-90. fathoms water. Fossil, 40 sp. Carb./—; 
Britain, France, ete. . tortwosa, Ads. (Ixviii, 83 . 
Shell small, white, and polished; slender, elongated with 
numerous level whorls, spire often curved to one side ; obscurely 
marked on one side by a series of periodic mouths, which form 
prominent ribs internally ; apex acute; aperture oval, pointed 
above; outer lip thickened internally; inner lip reflected over 
the pillar, not umbilicated. Operculum horny, subspiral. 
Animal, tentacles subulate, close, with the eyes immersed at 
their posterior bases ; proboscis long, retractile ; foot truncated 
in front, mentum bilobed; operculum lobe winged on each side ; 
branchial plume single; mantle with a rudimentary siphonal 
fold. 
The Eulime creep with the foot much in advance of the head, 
which is usually concealed within the aperture, the tentacles only 
protruding.—F ores. 
APICALIA, A. Adams, 1862. Apex more mucronated, spire 
more distorted. H. gibba, A. Ad. Japan. 
EULIMOPsIS, Brugnone. Shell small, fusiformly turreted, sub- 
acute; base striate, whorls scarcely convex, with superficial 
sutures; aperture rhombovate, lip sinuous, columella contorted. 
E. Carmelex, Brugnone (Ixviii, 84). Pliocene; Sicily. 
ARCUELLA, Nevill. (Bacula, H.and A. Adams.) Differs from 
the typical Eulima by having spiral strive, and the columella 
twisted back so as to form an acute angle at the base of the 
aperture. . mirifica, Nevill (Ixviii, 85). Mauritius. 
1opsis, Gabb. Differs from Eulima in its faintly twisted 
columella, which is produced in front so as to form a short, 
