198 Mr. Monracu’s Account of some new and rare 
when extended ; these in appearance are disposed in four fasci- 
culi on each side of the back, and are occasionally divided, or 
connected transversely : thesustentaculum is slender, from which 
in front issue two laterally recurved, fleshy members, that seem 
to assist progressive motion: behind the two posterior tentacula . 
are two very minute black eyes, generally obscured by the ante-- 
rior fasciculate papille, which are so nearly connected with 
those tentacula as might occasion their being confounded, did 
not their wrinkled summits bespeak their distinction : the colour 
of the whole body of the animal is purplish pink, the papille 
more of a scarlet, inclining to orange towards their ends, the 
tips white. : TY 
. Length full half an inch. Devon coast: rare. 
This extremely beautiful animal is without doubt a Tritonia of 
the new school: the body is not bilaminated, or covered with a 
marginal membrane like that which is now essential to constitute 
‘a true Doris; nor has it the anus on the back, nor ventral 
plumes; but the tentacula are retractile within receptacles, 
. Doris BIFIDA. 
Tas. XIV. Fig. 2. 
Body linear, posteriorly acuminated : the front rounded, with 
two broad erect bifid tentacula, the divisions of which are ob- 
tuse and unequal: along each side are about twelve peduncu- 
lated appendages of different sizes, three pair of which are greatly 
superior to the rest; these, when examined by a microscope, 
show the clavate part to be ramified, but the ramifications ap- 
_ pear to be connected by, and enveloped with, a fine transparent 
membrane: behind the tentacula two black eyes are very evi- 
dent; beneath these a pink spot was observed to be moveable 
beneath the skin: the colour is whitish, with a reddish-brown 
. line 
