INDIAN NUDIBRANCHIATE MOLLUSCA. 127 



through. Dorsal tentacles rather long and tapering, brown, wilh pale tips ; the laminee 

 divided in front by a tine 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 pinnce : 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. 



DORIDOPSIS CLAVULATA, n. sp. (PI. 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 2^ 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. 



DoRiDOPSis TUBERCULOSA, Quoy 8( Gaimurd (sp.). (PI. XXIX. figs. 8, 9, 10.) 

 Body oblong-oval, rather depressed, semigelatinous. Cloak ample, yellowish brown 

 inclining to ohve, 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 

 laminae, below which latter is a ring of white, with a streak from it running up be- 

 tween the laminae to the apex ; retractile within small sheaths. Oral tentacles linear. 



VOL. v. PART III. s 



