INDIAN NUDIBRANCHIATE MOLLUSCA. 129 



seen from the under side. Branchial plumes bluish black. Foot dark smoky brown, 

 with a pale reddish margin. 



Var. b. Cloak black, with simple white tubercular spots ; margin blue, with a rose- 

 coloured or crimson line within it, surrounding the cloak. Branchial plumes brown. 

 Foot dark brown, with a paler red edge (Doris atroviridis, Kel.). 



Var. c. Cloak dark yellowish brown on the back, becoming paler towards the sides, 

 with a faint blue margin : spots as in the typical form. Branchial plumes brown. 



Doris nigra, Stimp. in Proc. Philad. Acad. Nat. Sc. 1855. 



Doris atrata and D. atroviridis, Kel. in Journ. Asiatic Soc. 1858 ; idem in Ann. Nat. 

 Hist. 3rd ser. vol. iii. pp. 299, 300. 



This species appears to be plentiful and widely distributed ; the specimens described 

 by Professor Stimpson having been obtained at the Loo Choo Islands. The Doris 

 atrata and D. atroviridis of Kelaart were considered by him to be distinct species ; but 

 the varieties enumerated above show that they pass into each other by imperceptible 

 gradations. 



Several specimens were preserved. 



DORIDOPSIS ATROMACULATA, n. sp. (PI. XXXI. figs. 20, 21, 22, 23, 24.) 



Body ovate, rather convex. Cloak soft and thick, pale bufF-coloured, with various- 

 sized scattered papillse : the largest of these are black, and give the cloak a spotted 

 appearance ; they are slightly branched or serrated, with pointed white tips ; the 

 smaller papillae are slender, less branched, pointed, and of the same colour as the cloak. 

 Dorsal tentacles yellowish, with numerous laminae, tapering towards the apex and 

 separated by a ridge in front. Branchial plumes three, tripinnate, snufF-brown- 

 coloured : two are lateral and one posterior, with a rudimentary plume in front : anal 

 tube large, nearly central, on the left side of the posterior plume. Head not visible 

 externally ; oral aperture minute, situated immediately in front of the thickened margin 

 of the foot. Foot oblong-oval, of a deeper buff colour than the cloak, with a dark 

 blotch in front. Length 2 inches. 



Rare ; one specimen only preserved. 



DORIDOPSIS PUNCTATA, n. sp. (PI. XXXI. fig. 17.) 

 Body ovate, rather convex, broad behind and subtruucate in front. Cloak yellowish, 

 soft, with a few opake white tubercular freckles, and scattered, sharp, black, minute 

 spots or points : there are also along the margins and near the tentacles and branchiae 

 numerous blurred spots and blotches of a dusky violet colour, with generally a black 

 point in the centre and a few clustered about it : under side pale, with scattered black 

 freckles. Dorsal tentacles small, ciavate, placed near to each other. Branchial plumes 

 three, tripinnate, two placed forward and one behind, the anus opening at the right side 

 of the posterior plume : the stems are stout and dark, with a few freckles ; the pinnte 



s2 



