136 MANUAL OF THE MOLLUSCA. 



Chemmtzia, D'Orbigny. 



Etym., named in honour of Chemnitz, a distinguished conchologist of 

 Nm-emburg, who published seven volumes in continuation of Martini's " Con- 

 chylien- Cabinet," 1780-95 . 



Si/n., turbonilla, Risso. Partheuia, Lowe. Pyramis and Jaminea, Br. 

 Monoptigma, Gray. Amoura, Moller. 



Type, C. elegantissima. PI. VIll., fig. 13. 



Shell slender, elongated, many-whirled ; whii'ls plaited ; apex sinistral ; 

 aperture simple ; ovate ; peristome incomplete ; operculum homy, sub-spiral. 



Animal, head very short, furnished with a long, retractile proboscis ; ten- 

 tacles triangular ; eyes immersed at the inner angles of the tentacles ; foot I 

 truncated in front, with a distinct mentiim. 



Distr., Brit. (4 sp.), Norway, Medit. Probably world-wide. Range from i 

 low water to 90 fms. 



Fossil, 180 sp. Permian — . Brit., France, &c. 



The " melanite" of the secondary rocks are provisionally referred to this \ 

 genus. Those of the palaeozoic strata to loxonema. 



Sub-genus. Eidimella, Forbes. E. scillee, Scacchi. 4 Brit. sp. Shell J 

 smooth and polished ; columella simple ; apex sinistral. 



EuLiMA, Risso, 1826. 



Etym., eulimia, ravenous hunger. Syn., pasithea, Lea. 



Type, E. polita. PI. VIIL, fig. 14. 



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

 whirls ; obscurely marked on one side by a series of periodic mouths, which 

 foi-m prominent ribs internally ; apex acute ; aperture oval, pointed above ; 

 outer lip thickened internally ; inner lip reflected over the pillar. Operculum 

 homy, sub -spiral. 



Animal, tentacles subulate, close, with the eyes immersed at their poste- 

 rior bases ; proboscis long, retractile ; foot truncated in front, nientimi bi- 

 lobed ; operc. lobe winged on each side ; branchial plume single ; mantle with 

 a rudimentaiy siphonal fold. 



The eulimre creep with the foot much in advance of the head, which is 

 usually concealed within the apertm-e, the tentacles only protruding. (Forbes.) 



Distr., 15 sp. Brit., Medit., India, Australia, Pacific. In 5 — 90 fms. 

 water. | 



7^055//, 40 sp. Carb.?— . Brit., France, &c. ] 



Sub-genus. Niso, Risso (=Bonellia, Desh.). N. terebellatus. Lam. sp. 

 Axis perforated. 



Fossil, 3 sp. Eocene—. Paris. Distr., 5 sp. China, W. America 

 (Cuming). 



Stylina, Fleming. 



E.T., S. astericola. PI. VIIT., fig. 15. (Syn. stylifer, BiX)d.) 



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