_- 
GASTEROPODA. 231 
crowded cirrhi of a delicate purple colour. Head large and thick, 
proboscidiform, with the mouth just under its upper edge. ‘Tentacles 
short, thick and conical, with the eyes on a slight lateral enlargement, 
about midway of their length. Foot short, oval, truncate anteriorly, 
with a very distinct, transverse, marginal furrow ; colour clear yellow 
anteriorly, with a slaty tint posteriorly. 
Operculum thin, semitransparent, brown, slender, unguiform ; apex 
terminal, incremental lines distinct, every fourth or fifth stria coarser 
than the rest. 
The animal secretes abundantly a sap-green viscous fluid. [J. P. c. ] 
Figure 281, shell, with the animal; 251 a, ventral view of a small 
shell. 
Fusus tiratus (Couthouy MS.) 
Testa parva, solida, ovato-fusiformis, straminea, longitudinahter plicis 
angularibus instructa et striis profundis cincta ; spira brevis, conica ; 
anfractibus septem, ventricosis posticé angulatis, ultimo trientes 
duos longitudinis teste adequante, antrorsum in rostrum tenue 
contortum sulito contracto: apertura angusta, ovata, in canalem 
obducta ; columella polita, contorta, alba. 
Fusus liratus, Cournouy MS.; Proceed. Boston Soc. Nat. Hist., ii. 
141. May 1849. Expedition Shells, 64. 
AnimaL uniform pale yellow; tentacles very broad at base, short 
subulate, compressed ; eyes on a lateral enlargement at their lower 
third; foot oval, truncate anteriorly, always extended so as to conceal 
the mouth, the only portion of the head visible during crawling being 
_ the tentacles Operculum unguiculate, thin, pale yellow, increment 
very slow, the strie being scarcely visible. 
SHELL fusiform, turreted, polished, yellowish white, with traces of 
a thin epidermis. Spire acute, whorls seven, slightly swelling, the 
last about two-thirds the whole length of the shell, suddenly con- 
tracted at its anterior third ; all the volutions are marked by prominent, 
