192 MOLLUSCA. 
Figures 222, 222 a, 222), three views of the shell. 
Trocuus (BemBIcIUM) SQuaMIFrERUS ! (Koch). 
The animal of a shell, which seems to belong to the species above 
mentioned, is interesting as showing that the genus Bembicium, pro- 
posed by Philippi, is founded in zoological as well as testaceological 
characters. It has an elongated proboscis, transversely lineated, and 
a vertical mouth; the tentacles are long, annulated, with the eyes on 
their enlarged base ; there are no ocular auricles, and no lateral cirrhi. 
The shell seems to be destitute of the pearly structure of the 
‘Trochide in general. 
Figure 227, the shell, with the animal as in motion; 227 a, the 
locomotive disk. 
Marearira Macetuanica (Gould). 
Testa depresso-conica, solida, imperforata, polita, rufa, interdum sordideé 
flavescens: spira anfractibus quinque ad sex convexis, ultimo ad 
peripheriam sub-angulato : basis tumida: apertura ampla, subcireu- 
laris ; columella rotundata, viz arcuata angulum basalem cum labro 
efformante: faux vivide iridescens. 
Animau pale ochreous; head prolonged into a sort of hood, the 
lappets of which curve outwardly upon the foot with the mouth 
between them: tentacles very long and slender, with large and bright 
eyes on a bulbous protuberance at the base: body with a lateral veil 
passing from behind the head to the operculum, bearing on each side 
four slender filaments, the second and third more remote from each 
other than the rest. Foot very long, narrow, attenuated backward, 
the anterior angles prolonged into a sort of tentacle on each side. 
[it Peace] 
SHELL small, low conical, smooth and shining, somewhat pearly ; 
whorls five or six, convex, obtusely angular at the periphery ; suture 
well marked: base convex, not centrally pitted : aperture nearly cir- 
cular; lip sharp, and at the base forming a decided angle with the 
