LIOTIIDA. 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. 
Liotra, Gray. 
Distr.— Tropical and subtropical. Fossil. Jurassic—. L. 
scalaroides, Reeve (1xxix, 87). 
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. JL. 
australis, Kiener (xxix, 88). 
CycLostREMA, Marryat. 
Syn.—Delphinoidea, Brown. Lippistes, Montf. 
Distr.—23 sp. Mostly Japan and Philippines ; Europe, Aus- 
tralia, West Indies. C. cancellata, 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, suberenulated, 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. MM. costulata, Moller. Europe. 
pARoNIA, A. Ad. Shell orbicular, discoidal, evolute, spire 
depressly concave; whorls rounded, more or less disunited ; 
aperture circular, peritreme continuous. Philippines, Japan. 
C. sptrula, 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. (1xxix,91). 
MicroTHECA, A. Ad. Shell globosely turbinate, widely umbili- 
cate, somewhat porcellanous; radiately, rugosely plicate; sutures 
channeled: whorls crenulate at the sutures; aperture semicircu- 
