240 MANUAL or THE MOLLUSC A. 



EuLiMA, Eisso, 1826. 



Etymology, eulimia, ravenous hunger 



Synonym, Pasithea, Lea. 



Type, E. poHta. PL VIII., Fig. 14. 



Shell small, white, and polished; slender, elongated with 

 numerous level whorls ; 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 ; operculum 

 horny, sub-spiral. 



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.) 



JDistribution, 49 species. Britain, Mediterranean, India, 

 Australia, Pacific. In 5 — 90 fathoms water. 



Fossil, 40 species. Garb. ? — . Britain, France, &c. 



Sub-genus. Niso, Risso (== Bonellia, Deshayes). N. tere- 

 bellatus. Lam. species. Axis perforated. 



Fossil, 3 species. Eocene — . Paris. 



Distribution, 5 species. China, "West America. (Cuming.) 



MoNOPTiGMA, Lea. 



Synonyms, Melanioides, Lea = M". striata. Gray (name only). 



Shell like Chemnitzia, rather fusiform, spirally grooved ; 

 columella slightly folded, with a sinus at the base. 



Distribution, 12 species. Indo-Pacific. 



Menestho, MoUer (Turbo albulus, Fabr. Greenland) v. 

 Chemnitzia. 



AcLis, Loven. 



E'ymology, A, without, hleis, a projection. 



Synonym, Alvania, Leach (not Risso). 



Type, A. supranitida. "Wood. A. ascaris, Turt. PI. IX., 

 Fig. 4. 



Shell minute, like turritella ; spirally striated ; aperture oval ; 

 outer lip prominent; axis slightly rimate ; operculate; apex 

 sinistral. 



