Ceylon Nudibranchiate Molluscs, and Zoophytes, 93 



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 vivarium. When at rest, the mantle 

 was turned inwards towards the back; in this position the 

 white and red 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 species, but it 

 is only when the mantle is fully expanded and floating on the 

 water, that the unrivalled charms of this beautiful sea-nymph 

 is seen to perfection, In the young, the mantle extends 

 round the head, and 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 

 marginata, I should still prefer retaining the name I have 

 given it, as " Marginata" would apply, equally as well, to 

 several other species as to this. 



/ 



Doris MacCarthyi. Kel. v 



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 ; laminated obliquely, for nearly § of its length ; of a 

 pale blue colour with white streaks. Oral tentacles white, 

 short, broad and rounded. Branchial plumes 12 to 15; ir- 

 regular, 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. 



