LIOTIID^, 299 



The animal differs from that of Turbo by the absence of lobes 

 between the tentacles, but appendages are present on the outer 

 side of these ; median head-lobes are, however, known in Cyclo- 

 strema, the animal of which rather resembles that of Scissurella ; 

 the body is cylindrical, tentacles either thick and short or thin 

 and prolonged ; foot small, with short appendages, head pro- 

 duced, eyes on conspicuously thickened bulgings. 



LiOTiA, Gray. 



Distr. — Tropical and subtropical. Fossil. Jurassic — . L. 

 scalaroides, Reeve (Ixxix, 81). 



Shell turbinated or depressed, varicose, perforated or umbili- 

 cated; whorls ribbed or cancellated; aperture rounded, pearly 

 within ; peristome thick, callously margined. 



ARENE, H. and A. Adams. Whorls muricated, the last sub- 

 spinous or angulated ; peritreme more or less angular. L. 

 australis, Kiener (Ixxix, 88). 



Cyclostrema, Marrj^at. 



Syn. — Delphinoidea, Brown. Lippistes, Montf. 



Distr. — 23 sp. Mostly Japan and Philippines ; Europe, Aus- 

 tralia, West Indies. G. cancellafa, Marryat (Ixxix, 89). Fossil. 

 Tertiary. 



Shell orbicular, depressed, widely umbilicated, spire short ; 

 whorls transversely striated or cancellated ; aperture round, not 

 nacreous ; peristome continuous, simple. 



Animal. Eye-peduncles very short ; tentacles ciliated ; foot 

 with long, curved, linear auricles in front, the sides with three 

 ciliated filaments. 



CYNiscus, H. and A. Adams. Umbilicus surrounded by a spiral 

 callosity ; whorls ornamented by transverse granose ribs ; outer 

 lip rather thick, subcrenulated, prolonged posteriorly upon the 

 penultimate whorl. C. granulata, A. Ad. 



MOLLERiA, Jeffreys. Shell remarkably solid, with strong and 

 partly dichotomous transverse ribs ; peristome continuous. 

 Operculum calcareous, multispiral. Foot furnished with fila- 

 ments. M. costulata, Moller. Europe. 



DARONiA, A. Ad. Shell orbicular, discoidal, evolute, spire 

 depressly concave ; whorls rounded, more or less disunited ; 

 aperture circular, peritreme continuous. Philippines, Japan. 

 C. spirula^ A. Ad. (Ixxix, 90). 



TUBiOLA, A. Ad. Shell subevolute or loosely enrolled ; whorls 

 rounded, simple, concentrically striated; aperture subcircular ; 

 peritreme continuous, margin acute, entire. Two Japanese and 

 one British species (Skenea divisa). C. nivea, Chemn. (Ixxix, 91). 



MICROTHECA, A. Ad. Shell giobosely turbinate, widely umbili- 

 cate, somewhat porcellanous ; radiately,rugosely plicate; sutures 

 channeled : whorls crenulate at the sutures ; aperture semicircu- 



