EULTMTD^. 229 



STREBLOCERAS, Carpenter, 1858. Shell not decollated, the per- 

 manent nucleus lying in a plane perpendicular to the adult tube. 

 C. cor7iuoides, Carp. 



PARASTROPHiA Foliu. (Morcletia, Folin.) Nuclear whorls sub- 

 spiral in one plane, as in the typical group, but persistent ; tube 

 inflated anteriorly. 



Family ErLIMIDJE. 



Animal having slender, subulate, simple teiitacles, 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. 



BuLiMA, Bisso. 



Etym. — Eulimia^ 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, etc. E. tortuosa, 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 Eulimse creep with the foot much in advance of the head, 

 which is usually concealed within the aperture, the tentacles only 

 protruding. — Forbes. 



APIOALIA, A. Adams, 1862. Apex more mucronated, spire 

 more distorted. E. gibba^ A. Ad. Japan. 



EULiMOPSis, Brugnone. Shell small, fusiformly turreted, sub- 

 acute ; base striate, whorls scarcely convex, with sviperflcial 

 sutures ; apertiire rhombovate, lip sinuous, columella contorted. 

 E. Carmelse, Brugnone (Ixviii, 84). Pliocene ; Sicily. 



ARCUELLA, Ncvill. (Bacula, H. and A, Adams.) Differs from 

 the typical Eulima by having spiral strise, and the columella 

 twisted back so as to form an acute angle at the base of the 

 aperture. E. mirifica^ Nevill (Ixviii, 85). Mauritius. 



lOPSis, Gabb. Differs from Eulima in its faintly twisted 

 columella, which is produced in front so as to form a short. 



