126 MESSRS. ALDER AND HANCOCK ON 



body as a constricted tube ; and the intestine is considerably enlarged as it leaves the 

 stomach. 



DoRiDOPSis RUBRA, Kelattrt, sp. (PI. XXXI. figs. 1, 2.) 



Body oblong-oval, rather depressed. Cloak well developed, smooth, and soft, of a 

 rose-colour with brown blotches : under side pale, without markings. Dorsal tentacles 

 placed well forward and near to each other ; the laminae rose-coloured, and divided in 

 front by an elevated line ; the cavities a little marginated. Head very indistinct, 

 slightly lobed at the sides. Branchial plumes six, quadripinnate, rose-coloured, luxu- 

 riantly developed, forming a complete circle. Foot pale rose-coloured, broad, having 

 the mouth, which is small and circular, opening further back than usual on the anterior 

 margin. Length from 1^ to 3 inches. 



Don's rubra, Kel. in Journ. Asiatic Soc. (Ceylon Branch) 1858 ; idem in Ann. Nat. 

 Hist. 3rd ser. vol. iii. p. 298. 



A beautiful variety occurs, with the markings of a dark rose-colour. This is a com- 

 mon species, of which several good specimens are preserved in the collection. 



DORIDOPSIS FUSCA, u. sp. (PI. XXXI. tig. 3.) 



Body oval, rather depressed. Cloak smooth and soft, undulating a little at the 

 margin, of an olive-brown colour with darker blotches, and becoming paler towards the 

 margin. Dorsal tentacles rather small, with brown laminae and pale tips ; the cavities 

 slightly marginated. Branchial plumes six, large, quadripinnate, reddish brown. Foot 

 broad, with the mouth situated as in D. rubra. Length from 2 to 2^ inches. 



There may be some doubt whether this is distinct from the last. 



DoRIDOPSlS GEMMACEA, n. sp. (PI. XXXI. figs. 4, 5, 6, 7.) 

 Body elongated, with the sides nearly parallel, and rounded at both ends. Cloak soft 

 but tough, the dorsal portion with three longitudinal rows (one central and two lateral) 

 of depressed, smooth, lozenge-shaped areas, of a rich brown colour, with a few brilliant 

 blue spots in each ; there are also two irregularly formed areas of similar character in 

 front of the tentacles, and a few smaller ones down the sides. Between those on the 

 back are two rows of elevated lozenge-shaped areas confluent with the rest of the cloak, 

 and united in front behind the tentacles ; these are of a pale brownish colour, with paler 

 concentric lines, and have a large soft tubercle in the centre of each, with a dark bluish 

 spot at the apex, and are surrounded by smaller tubercles at the base. These elevated 

 areas are united at the angles, where there is usually a tubercle similar to those of the 

 areas ; other small tubercles and irregular dark areas are dispersed on the sides of the 

 cloak, which in that portion is pale yellowish white, and marked at the extreme margin 

 with sublinear blotches of blue or lilac, arranged in pairs in a radiating manner. Under 

 side of the cloak pale, without markings, but with the blue or lilac blotches appearing 



