Ceylon Nudibranchiate Molluscs, and Zoophytes. 119 



Fam. Elysiad.e. 



Grenus. Elysia. Risso. 



Animal elliptical, depressed, with wing-like lateral expan- 

 sions ; tentacles simple, with sessile eyes behind them ; foot 

 narrow. 



Elysia Grandifolia. Kel. 



Head and body light green ; white, and occasionally black 

 spotted. Head and neck naked. Tentacles 2, folded longi- 

 tudinally, on side of head; bronzed green, tip brown. Buccal 

 tentacles 2, small. Membranous wing-like expansion on each 

 side of body ; broad anteriorly ; acutely pointed posteriorly, 

 and united at the tail. Membrane green. Edged with a 

 black and a golden yellow line. No distinct foot. Orifice on 

 the back (?) Mouth beneath. 



The whole animal gives one the idea of a large leaf ; and 

 when moving, that of a butterfly. Found on sea weed. Some 

 are more than 3 inches long ; greatest transverse diameter, 

 with wings expanded, inches. Distinct veins, filled with 

 fluid seen on the wings ; the heart pulsating on the centre 

 of the back. I have some doubts as to the propriety of 

 placing this interesting creature under the head of Elysia. 

 If on further investigation, it is found that it does not belong 

 to any known genera, I propose naming it Hydropsyche . 



Elysia Punctata. Kel. J 



N Smaller than the last species ; largest specimen seen 

 measuring 1 J inch. 



Animal of a lighter green colour. Tentacles dark brown, 



