Ceylon Nudibranchiate Molluscs. 123 



Very common in Trincomalie. Found in low water, on 

 coral stones and sea weed, nearly throughout the year. 

 Spawns in May, June and July. 



Pleurobranchus Eeticulatus? Gmel. 



Pale orange red, reticulated mantle, and spotted purple. 

 About 2 inches long. Found near Fort Frederick, Trinco- 

 malie, in shallow water, among rocks. 



Pleurobranchus Zeylanicus. Kch 



Pale yellow, splashed with darker yellow and brown, and 

 minutely spotted with rusty brown. 

 About 2 inches long. 

 Rare ; found in Back bay. 



Pleurobranchus Purpureus. Kel 



Deep reddish purple. Mantle very dark purple, and spotted 

 with still darker purple. There is a bright white zig-zag 

 line on each side of the back of some large specimen^. Length 

 nearly 6 inches ; 4 inches broad. The young is of a lighter 

 purple, and may be mistaken for another species. 



Found in deep water, Trincomalie. 



