392 Dr. E. F. Kelaavt on new species of Ceylonese MoUusca. 



the mantle, with its soft snowy-white undulating edge, is best 

 seen when the animal is swimming, and reflecting in the water 

 the rich red folds near the golden-speckled back, on which is 

 placed a broad circle of rosy-coloured feathery tufts. The live 

 specimen, of which the above is but a faint description, was 

 found under corals at low-water, near Fort Frederick. In an- 

 other specimen from the same locality, the white edge of the 

 mantle was I'eplaced by a rich crimson-red, which coalesced with 

 the inner red line, leaving a faint white line. Indeed, it is a 

 question which of the two varieties looked more beautiful; at 

 night, however, the palm of beauty was awarded to the red- 

 margined specimen. They both lived for some days in a viva- 

 rium. When at rest, the mantle was turned inwards towards the 

 back ; in this position, the white and i-ed lines were hidden by 

 the broad rolls on each side, displaying the rich profusion of 

 red and yellow dotted splashes and undulating lines of the under 

 surface of the mantle. In fact, it then looked like another spe- 

 cies ; but it is only when the mantle is fully expanded and 

 floating on the water that the unrivalled charms of this beautiful 

 Sea-nymph are seen to perfection. In the young, the mantle 

 extends round the head ; and this may be mistaken for a distinct 

 species. I have not had an opportunity of seeing the spawn of 

 this species. 



If this splendidly coloured Sea-nymph is identical with 

 Leuckart's species, found in the Red Sea, and named Doris mar- 

 ginata, I should still prefer retaining the name I have given it, 

 as marginata would apply equally well to several other species 

 as to this. 



Doris MacCarthyi, Kel. 



Body nearly 2^ inches long, dusky grey. Mantle long, narrow, 

 dusky grey, bordered with a bright-blue line ; edge crenulated, 

 wavy. Dorsal tentacles long, conical, obtusely pointed, lami- 

 nated obliquely for nearly two-thirds of their length, of a pale 

 blue colour, with white streaks. Oral tentacles white, short, 

 broad, and rounded. Branchial plumes twelve to fifteen, 

 irregular, most of them of unequal length, pinnated, and a 

 few trifurcated ; others have a small cluster of plumes rising 

 from the middle or extremity. Foot white, and nearly as long- 

 as the mantle. 



This curious but elegant species is semigelatinous, and re- 

 sembles a Goniodoris. Its narrow mantle scarcely covering the 

 foot, the body is almost exposed. 



I have dedicated this beautiful species to one who has always 

 encouraged my pursuits in the field of natural history. To 



