INDIAN NUDIBRANCHIATE MOLLUSCA. 127 
through. Dorsal tentacles rather long and tapering, brown, with pale tips; the laminz 
divided in front by a fine ridge: they are retractile within very short sheaths with pale 
margins. Branchial plumes five, large and spreading, quadripinnate ; the circle open 
behind ; of a yellowish-brown colour, beautifully lineated externally with dark brown, 
following the ramifications to the extreme pinnz : the inner surface darker: margin of 
the cavity slightly tuberculated. Head small, with the lateral angles a little produced ; 
mouth opening on the anterior margin of the foot. Foot ample, pale, without markings, 
produced a little behind the cloak in progression. The upper surface yellowish brown, 
with a pale margin, within which is an obscure dark line. Length from 2 to 4 inches. 
Spawn yellowish white, in the form of a narrow band in two or three open coils. 
This elegant species varies a little in colour and markings. It is not uncommon. 
Two or three specimens are preserved, in good condition. 
Doripopsis cLavuLaTa, n. sp. (Pl. XXXI. figs. 10, 11, 12.) 
Body elongated, depressed, and equally rounded at both ends. Cloak firm, but soft, 
of a brick-red colour, covered with large, rounded, soft tubercles paler than the cloak, 
tipped with yellow, and encircled at their base with dark red lines: a row of tubercles 
larger than the rest runs along each side of the back, exterior to which is a row of five 
or six nearly circular dark areas, with a few blue spots in each. The margin of the 
cloak is sinuous, and marked with dark yellowish-brown blotches: under side yellowish 
white, with corresponding blotches. Dorsal tentacles rather small, dark brown, with 
white tips; the laminated portion long and tapering: they are retractile within short 
sheaths with tuberculated margins. Branchial plumes five, large and spreading, quadri- 
pinnate, of a rich golden-brown colour, changing to violet at the edges ; the stem and 
branches lineated with dark brown on both surfaces. Head small, with narrow auri- 
cular prolongations. Foot oblong-ovate, of a dark chocolate-brown colour above and 
below ; margined with pale ochreous yellow. Length 23 inches and upwards. 
A beautiful species, of which three well-preserved individuals are in the collection ; 
it is nearly allied to the last, though evidently distinct from it. The spawn is whitish, 
forming a narrow, tortuous riband of no great length. 
Dorivopsis TuBERCULOSA, Quoy & Gaimard (sp.). (Pl. X XIX. figs. 8, 9, 10.) 
Body oblong-oval, rather depressed, semigelatinous. Cloak ample. yellowish brown 
inclining to olive, areolated and tuberculated ; studded with large, warty, conical 
nodules, each surrounded by a circle of tubercles at the base. Under side smooth, of 
an olive-colour more or less deep, and covered with large, circular, white spots, 
generally circumscribed by a narrow ring of black. Dorsal tentacles stout, broadly 
laminated, generally turned a little backwards, dark chocolate-brown on the stem and 
laminz, below which latter is a ring of white, with a streak from it running up be- 
tween the laminz to the apex; retractile within small sheaths. Oral tentacles linear. 
VOL. V.—PART III. s 
