Dr. E. F. Kelaart on new species of Ceylonese Molksca. 293 



Sir Charles MacCarthy, the Colonial Secretary of Ceylon, I feel 

 grateful for that assistance which his position in the island 

 enabled him to give me, whenever required; and I also feel 

 thankful to him for the warm interest he has taken in my em- 

 ployment as naturalist to investigate the natural history of the 

 Pearl Oysters. 



Doris coelestis, Kel. 



Body white, 2-2- inches long, flattened. Mantle coriaceous, 

 white, clouded with dark-purple minute rings, confluent or 

 continuous with lighter-coloured purple rings set more widely 

 apart. Dorsal tentacles white, long ; apex clavate, lamellated, 

 slightly truncated on the superior edge, pale green tipped 

 with orange; margin of sheath orange or golden. Oral ten- 

 tacles long, acutely pointed, white, minutely speckled with 

 purple. Branchial plumes six, long, tripinnated, whitish ; ribs 

 purplish brown, edge of cavity orange. Foot white, shorter 

 than mantle, grooved; lower lamella notched. 



This beautiful purple-clouded Doris is of very retiring habits, 

 and is scarcely ever seen moving. Obtained in August and Sep- 

 tember from rocks in Back Bay. Ova white, in three or four 

 broad coils. 



Doris funehris, Kel. 



Body nearly If inch long, oblong, convex, of a waxy-white 

 colour, and spotted with black. Mantle coriaceous, granular, of 

 an ivory-white colour, and ornamented with jet-black spotted 

 circles and half-rings or imperfect annular spotted figures. 

 Dorsal tentacles large, clavate ; apex black, laminated, with- 

 out sheaths. Oral tentacles linear, white, tip black. Branchial 

 plumes six, large and drooping, tripinnate, white and shaded 

 lavender-grey ; midribs of a dark brown colour. Foot waxy- 

 white, spotted irregularly on the margin of the edges with small 

 and large linear spots. 



This elegant funereal-looking Doris is, with the mantle, about 

 2|- inches long and \h broad. Rarely seen. Lives for a long 

 time in the aquarium. Deposits its ova in broad convoluted 

 bands, which, when uncoiled, measure nearly 18 inches in length. 

 A pair kept in the aquarium were seen to spawn in July. While 

 one was depositing the band of ova on the side of the glass globe, 

 the other kept watch, as it were, by moving in a circle round the 

 former. The whole process lasted about half an hour. 



The spots and markings of some specimens were of a dark 

 brown colom*. In others the spots were of an auburn colour. 



