494 Dr. E. F. Kelaart on new species of Ceylonese Mollusca. 



Order INFEROBRANCHIATA. 



Genus Phyllidia, Cuv. 



Animal oblong, covered with a coriaceous tuberculated mantle. 

 Dorsal tentacles clavate, retractile into cavities near the front 

 of the mantle. Mouth with two tentacles. Foot broadly oval. 

 Gills forming a series of laminae extending the entire length 

 of both sides. Excretory orifice in the middle line, near the 

 posterior end of the back, or between the mantle and foot. 

 Reproductive organs on the right side. Stomach simple, mem- 

 branous, 



Phyllidia zeylanica^ Kel. 



Mantle tubercular, salmon-coloured ; three continuous black lines 

 run round the whole length ; the internal one broader, taking 

 within its circuit the dorsal tentacles and anal orifice; two 

 other lines run parallel to this all round the mantle, the 

 outer one narrowest. Dorsal tentacles large, conical, pointed, 

 circularly laminated at the upper half, which is of a black 

 colour. The two oral tentacles small, black. Foot whitish, 

 notched in front ; the blackish viscera seen through. Branchise 

 whitish on the sides of the body except in front. Anal opening 

 on a black-coloured tube, behind which there are four or five 

 large tubercles, of the same form as those on the other parts 

 of the mantle. Length 1 inch ; \ inch broad. 



Very rare. 



Genus Diphyllidia, Cuv. 

 Syn. hinguellay Blainv. 



Animal oblong. Mantle ample. Gills limited to the hinder 

 two-thirds of the body. Head with minute tentacles and a 

 lobe-like veil. Vent at the right side, behind the reproductive 

 orifices? Lingual teeth 30* 1*30. 



Diphyllidia formosaj Kel. 



Body pink. Mantle leaf-like, dark purple, with purplish-black 

 shades; edge yellow, streaked longitudinally with golden 

 yellow (broad lines alternating with very delicate narrow 

 ones). Veil purple-black, except the anterior edge; beneath, 

 of a lively pink colour. Foot pink, grooved in the median 

 line of posterior half. Branchise buff; a whitish spot on an- 

 terior third of plumes. Dorsal tentacles emerging through 

 notches on anterior edge of mantle ; tentacles red, with 

 blackish tips and sides. No oral tentacle. Length 2^ inches ; 

 1^ inch broad. 



This very beautiful species is found in deep water. It occa- 



