300 Dr. E. F. Kelaart on new species of Ceylonese MoUusca. 



think, be considered distinct, as it was not found in April, with 

 D. atrata, but subsequently, when the latter became scarce. 



Doris atroviridis, Kel. 



Body 10 lines long, of an invisible-green colour. Mantle broad, 

 undulating, of a greenish-black colour ; edge streaked with a 

 pale crimson line. Tentacles and branchiae as in D. atrata. 

 Foot of a pale invisible green. Ova like those of the pre- 

 ceding species. Some of the specimens had the mantle in- 

 distinctly but regularly spotted with white ; these spots, com- 

 posed of several smaller spots round a centre, looked, through 

 a magnifier, like little stars. 



The young of this species is of a jet-black colour, with a broad 

 brilliant crimson line round the edge of the mantle and /oo^. If 

 1 had not specimens of different ages to compare with, and to 

 observe the gradual diminution of the intensity of the red line, 

 till it became almost obsolete in the larger specimens, I should 

 be inclined to consider the characters of the young to be those 

 of a distinct species ; so very great are the external differences 

 of the young and older animals. The presence of the red line 

 in the young of this species, and its non-existence in the young 

 of D. atrata, still more confirm me in the opinion already ad- 

 vanced, that they are not identical species. Both are very slug- 

 gish in their habits ; generally two or more lie locked in each 

 other's embrace, under a stone or a coral branch. In confine- 

 ment they live longer than any species I have had under obser- 

 vation. 



Doris variabilis, Kel. 



Body 6 lines long, pellucid green ; the red viscera seen through 

 it. Mantle greenish brown, and marked with longitudinal 

 rows of reticulated whitish spots. Dorsal tentacles clavate, 

 laminated, greenish brown, speckled ; tip white. Branchial 

 plumes eight, small, round a central cavity, tripinnate, brown, 

 speckled with white. Foot pellucid green, shorter than mantle. 

 This species is found in great abundance on rocks in Dutch 

 Bay, at low-water mark. They vary much in depth of colour, 

 green, however, always prevailing. In habits like D. atrata, 



Doris exanthemata, Kel. 



Body 5 inches long, of a pinkish or light-purple colour. Mantle 

 long, broad, covered with large and small, smooth, conical 

 and rounded nodules, rising from smooth elevated bases. The 

 upper surface is of a deep olive-brown colour, having several 

 white splashes; edge of a lemon-colour. Under surface of 



