GASTEROPODA. 9-41 
Animal with a long retractile proboscis; tentacles close 
together, slender, inflated at the tips; eyes immersed at the 
bases of the tentacles; operculum lobe ample, unsymmetrical ; 
foot truncated in front. Ranges to 80 fathoms water. 5 British 
species, Norway. 
Fossil. Pspecies. Plocene—. Britain (Crag). 
Stytopryema, Adams. 1860. 
Shell pupiform, semi-transparent; with slightly conyex whorls. 
Aperture sub-quadrate. 
MyontA, Adams. 
Shell ovate, turreted; white, thin, with slightly conyex 
whorls. Aperture oblong. 
LEevcoTina, Adams. 
Shell like last, but with last whorl ventricose ; with minute 
dots, 
STILIFER, Brod. 
Exampie, S. astericola. Pl. VIII., Fig. 15. 
Synonym, Stylina, Fleming. 
Shell hyaline, globular or subulate, apex tapering, styliform, 
nucleus sinistral. : 
Animal with slender, cylindrical tentacles, and small sessile 
eyes at their outer bases; mantle thick, reflected over the last 
whorls of the shell; foot large, with a frontal lobe. Branchial 
plume single. Attached to the spines of sea-urching, or immersed 
in lying star-fishes and corals. 
Distribution, 16 species. West Indies, Britain, Philippines, 
Gallapagos, Pacific. 
LoxonEMa, Phillips. 
Etymology, loxos, oblique, and nema, thread; in allusion to 
the striated surface of many species. 
Type, Li. sinuata, U. Devonian, Petherwin. 
Shell elongated, many-whorled ; aperture simple, attenuated 
above, effused below, with a sigmoidal edge to the outer lip. 
Fossil, 75 species. L, silurian—Trias. North America, Europe. 
MACROCHEILUS, Phillips. 
Etymology, macros, long, and cheilos, lip. 
Synonym, Polyphemopsis, Portlock. 
Shell thick, ventricose, buccinoid; aperture simjle, effuse 
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