GASTBROPODA. 317 
Shell thin, flexible, globosely-cylindrical, spire truncated, 
whorls channeled ; aperture long, expanded and deeply sinuated 
in front, outer margin disunited at the suture; columella open, 
exposing the whorls. 
Animal with a short and simple head-lobe, truncated in front 
and eyeless; lateral lobes nearly concealing the shell; lingual 
teeth hooked and serrulate, laterals about 40, narrow, claw- 
shaped; gizzard armed with horny teeth. 
Distribution, 7 species. Greenland, Britain, Mediterranean, 
Zanzibar, India, New Zealand. 
A. bullata is found amongst weed, in 1—15 fathoms water. 
(Forbes. ) 
CryxicHna, Lovén. 
Type, C. cylindracea, Pl. XIV., Fig. 10. 
Synonym, Bullina, Risso. 
Shell strong, cylindrical, smooth or punctate-striate; spire 
minute or truncated; aperture narrow, rounded in front; 
columella callous, with one plait. 
Animal shert and broad, not investing the shell; head 
flattened, truncated in front, with sub-centrally immersed eyes, 
tentacular lobes more or less united; foot oblong, posterior and 
lateral lobes not much developed ; gizzard armed; lingual tecth 
squarish, recurved and serrated, with 1 large and 5 or 6 small 
hooked laterals. 
Distribution, 40 species. United States, Greenland, Britain, 
Red Sea, Australia. 
Fossil, Tertiary—. Britain. 
? KLEINELLA, A. Adams. 
Shell thin, dotted, striated, columella smooth, spire obtuse. 
Distribution, 1 species. Japan. 
AMPHISPHYRA, Lovén. 
Type, A. pellucida, Johnst. (Amphi-sphyra, double hammer) 
Synonyms, Utriculus (part), Brown. MRhizorus, Montfort. 
Diaphana, Brown. 
Shell small, thin, ovate, truncated, spire minute papillary, 
aperture long. 
Animal entirely retractile into its shell; head wide, short, 
_ with lateral triangular tentacles; the eyes behind them minute, 
_ immersed; muzzle bilobed in front; foot oblong, truncated in 
_ front, notched behind ; teeth 1.1.1, central quadrate, serrulate ; 
laterals broad, hooked. 
