134 MESSRS. ALDER AND HANCOCK ON 



Dorsal tentacles set wide apart, stout, clavate, freckled with brown ; produced above 

 into a white mucro ; sheaths short, with the margins minutely papillated. Oral ten- 

 tacles forming broad lamelliform lobes. Branchial plumes five, tripinnate, large and 

 spreading, situated on an elevated portion of the centre of the back, and rising from a 

 slightly pedunculated base ; they are freckled like the body, with a pale line running up 

 the stem and branches. The dorsal ridge of the tail is produced into a large fin-like 

 expansion, the margin of which bears a few minute processes. Foot rather narrow, pale 

 yellowish white, pointed behind, and truncated in front, where there is a shallow groove 

 forming an indistinct frontal lamina : the upper surface is spotted with yellow or orange. 

 Length 1^ inch. 



A variety is of a deep orange-colour, darkest on the centre of the back, and without 

 markings : the branchiae and other processes are pale and nearly white : the upper 

 surface of the foot is also paler and spotted with orange. 



Polycera (?) ceylonica, Kel. in Journ. Asiatic Soc. (Ceylon Branch) 1858. 



This interesting moUusk is rather common on the Coromandel coast. According to 

 Dr. Kelaart, it is very rare in Ceylon. He remarks that " The transparent membranous 

 expansion is fully extended when the animal swims, which it does more freely than any 

 known species. For ten or fifteen minutes it will keep floating and moving its body 

 like an eel in the water." 



There are five or six specimens preserved in the collection. 



Genus Kalinga^ nov. gen. 



Body oval, subprismatic, rounded behind. Cloak not much produced, the margin 

 most developed in front, where there is a row of close-set papillated processes covering 

 the head ; a few similar processes are on the sides of the back. Dorsal tentacles lami- 

 nated, retractile within sheaths. Oral tentacles flattened. Branchiae plumose, non- 

 retractile, surrounding the vent, but placed separately at a little distance from it on the 

 posterior part of the back. Tongue broad, with numerous rather distant rows of tri- 

 cuspid spines : no jaws nor collar. 



This genus is somewhat intermediate between Euplocamus and Plocamophorus, but 

 differs from both in the obtusely rounded form of the body, and in the separate position 

 of the branchial plumes, in this respect approaching to Hexabranchus. It also differs 

 from Plocamophorus in the absence of an expanded veil, as well as of the peculiar fin* 

 like tail. The oral armature is likewise different from that of the two former. 



Of the three specimens in the collection, two were much mutilated, and the third was 

 quite in an immature state. The anatomy of all the organs, therefore, could not be 

 determined. 



The buccal organ is extremely large and muscular : it is of a rounded form, somewhat 



' An old Indian name for Telinguna. 



