a2 
character of the ano-dorsal five-branched rose or star of branchie. 
And if agreeing with the last of these two genera in the carinate or 
crested tail, it is at once distinguished by the presence of the frontal 
veil. 
The whole upper surface of the animal, which is from one inch 
and a half to two inches and a half long, about one-third of an inch 
broad and half an inch high, is of a pale dull red, mottled or freckled 
with brighter orange-red and yellow, and thickly speckled all over 
with dark chestnut-brown spots and dots, which are larger and sub- 
confluent in two sublateral darker lines or rows, meeting behind the 
branchial star upon the back, and smaller on the sides and veil. The 
tentacles above, and the foot alone beneath are immaculate, the latter 
being pale pellucid flesh-colour, with the extreme edges yellow. 
The edges of the veil, and the tips of the dorsal or sublateral 
branchiferous papille are fimbriato-ciliate. Of the latter, there are 
two rows on each side: the lower consisting each of six small and 
inconspicuous or obsolete papille; the upper, each of three much 
larger and more elongate or subcylindric bodies, placed at equal di- 
stances from one another, two in advance, and the third a little behind 
the ano-dorsal rose. The head or apex of each of this third or last 
pair forks into two parts, one of which is subdivided or ciliferous, 
like the other pairs; the other branch of the fork is simple and cla- 
vate, ending abruptly in a dark red sort of knob or button. The 
orifice of generation is on the right side of the neck, beneath the 
first of the upper row of branchiferous papille. During the animal’s 
life it appeared simple, but on contraction after death it was found 
to be composed of two apertures close together ; the male organ be- 
ing exserted from the anterior. 
The ano-dorsal branchial tuft or star is very large, and placed at 
the top of a strong hump or protuberance; the vent being in its 
centre, as in Doris. It appears, in general, equally five-rayed ; but 
assumes occasionally, as it also does sometimes in Doris, the appear- 
ance of being composed of two bifurcated lateral, and a simple ante- 
rior branch or ray. Its divisions are regularly and beautifully pec- 
tinate. The caudal fin-like crest begins a little behind it; and its 
edge is crisped or irregularly notched and plicate, and even obsoletely 
ciliate here and there, or fimbriate. In swimming, this crest is stiffly 
expanded into a broad fin, ending abruptly behind, as in Cuvier’s 
fig. 4. of Scyllea pelagica (Mém. des Moll.), but with the edge even 
or entire. 
In a glass of sea-water, in which this animal lived more than six 
weeks, it had the usual habits of a Doris, but these with more acti- 
vity : swimming about violently when disturbed or when provided 
with a fresh supply of water, in which operation the hind part of the 
body, with the crested fin-like tail, is lashed from side to side with a 
strong and regular sculling motion ; the fore-part, with the head or 
veil expanded also to its full dimensions, being at the same time beat 
with equal force and regularity in a contrary direction, or obliquely 
upwards and downwards, stroke for stroke ; these parts (the veil and 
crest) performing thus alike the office of true fins. At night, espe- 
