Dr. E. F. Kelaart on new species of Ceylonese Mollusca. 299 



oysters, and apparently fed on the back of the shells, upon the 

 living atoms found there. , 



Doris luteola, Kel. 



Semigelatinous. Body f inch long. Mantle granular, yellowish 

 ^ and shaded with darker yellow. Dorsal tentacles long, black, 



lamellated at apex. Oral tentacles short, white. Branchial 

 ■ plumes long, bipinnate, greenish. Foot white, shorter than 



mantle. 



This elegant species is found in shallow water; spawns in 

 October. Ova light green, in two narrow tape-like convolutions. 



Doris viperina, Kel. 



Body 2 inches long, white. Mantle coriaceous, oval, covered 

 with short spinous tubercles of a grey colour, and beautifully 

 spotted with dark-grey and purplish-brown spots having a 

 bluish shade. Under surface of mantle white, with purplish 

 spots ; a purplish line runs near the edge ; border transversely 

 streaked. Dorsal tentacles greenish-white, long, slightly 

 truncated, with laminated clavate tips. Oral tentacles white, 

 long, pointed. Branchial plumes six, short, broad, bipinnate, 

 of a greenish-white colour. Foot oblong, entirely covered 

 by the broad oval mantle ; white, spotted with smaller pur- 

 plish spots than those seen on the under surface of mantle. 



. Found in deep water, near the French Battery. 



Doris atratttj Kel. 



Body half an inch long and |^ inch broad, ovate, convex, of a 

 smoky-black colour. Mantle broad, when expanded covering 

 the foot, smooth; edge semitransparent, the rest jet-black. 

 Branchiae eight, small, of a smoky-black colour, bipinnate; 

 two sets, of four each, all entering the same cavity round the 

 anus. Foot long, narrow, rounded in front, slightly project- 



• ing behind when in progression, of a pale smoky colour. 

 Mouth indistinctly seen. Oral tentacles linear. Dorsal ten- 

 tacles pellucid, with clavate apex, black; tips white, looking 

 like eyes set on the tentacles. Ova white, in three or four 

 small, narrow, tape-like coils. 



This species may prove to be either identical with Doris fu- 

 mata of Leuckart, or D. fumosa of Quoy et Gaim., — the latter 

 more probably, as the remarkable white-tipped tentacles (always 

 present) could not have passed unobserved by Riippell. The 

 branchije, however, of D. fumata would appear to correspond 

 with those of the Ceylonese species. The next species, too, which 

 I regarded at one time aa only a variety of D. fumata, must, I 



