310 MOLLUSCA. 
liformi, serve unica utrinque ordinati: foramen generativum ab anali 
remotum, fere dorsali. 
This curious and hideous animal seems to belong to the family 
Tritoniade, with which it agrees in all respects except its curious oral 
apparatus. ‘The mouth is inferior, surrounded by a double series of 
long cirrhi, each of which has an independent motion. Two auriform 
appendages, on the back of the head, differing in no respect from the 
branchial expansions except in being destitute of reticulations, seem 
to be the true tentacles, and are retractile. ‘The eenerative aperture 
is at the usual place on the right side, the vent being distant, near the 
back. 
CHIORERA LEONINA (Gould). 
Corpus albidum, aurantiaco subtiliter reticulatum ; cirrhi labiales au- 
rantiaci: loli branchiales incolorati, aurantiaco venose: solea in- 
carnata. 
Body limaciform, smooth and of a pearly and whitish colour, finely 
reticulate with orange. The head is enormously enlarged, with a 
distinct neck, semiglobose, the oral face flattened. The oral fissure is 
longitudinal, the lips large, with the true mouth within at the poste- 
rior portion; around the edge of the oral disk or cowl is a double 
series of orange-coloured cirrhi, each of which has an independent 
motion. On the top of the head are two foliate expansions, destitute 
of venations, which answer to the true tentacles; on their anterior 
edge is an opaque, whitish papilla, presenting something of a spiral 
or lamellar structure; they were sometimes wholly retracted within a 
permanent sheath. Along the junction of the dorsal and lateral 
regions on each side is a series of six foliaceous, branchial expansions, 
or nutritive ceca, somewhat sinuous at margin, and attenuated at base, 
in which brownish vascular ramifications are plainly seen. The foot 
is smooth, flesh-coloured beneath, separated by a large fissure from 
the body, and folding longitudinally. Heart seen to pulsate at the 
middle of the back. 
Length five and a quarter inches; breadth of foot three-fourths of 
an inch; of body, an inch and a quarter ; diameter of head an inch and 
five-eighths ; height of body one inch. 
