190 32 



Dorididae cryptobranchiatae. 



Porostomata. 



Doriopsidae. 



Doriopsis, (Pease) Bgh. 



Comp. I.e. 1S92. pp. 1114— 1122. 



1. Doriopsis rubra (Kelaart). 



Doris rubra, Kelaart. New species of Ceylon nudibr. mollusks. Journ. of R.As. soc. (Ceylon) III. 1857. p. 92. 

 Doriopsis rubra, (Kelaart) Alder and Hancock, notice of a coll. of nudibr. moll. Trans, zool. soc. V, 3. 

 1864. p. 126. PL XXXI, Fig. 1-2. 

 — — , (Kelaart) Collingwood, on some new sp. of nudibr. moll. Trans. Linn. soc. 2 S. II, 2. 



1881. p. 135 (Pl.X, fig. 18). 



PI. II, Fig. 16. 



One single specimen of this species was taken on March 2 nd , 1900, at Koh Kram, 

 on a depth of 30 fathoms. 



The specimen which was kept in spirit, was highly contracted, soft; it had 

 a length of IS 1 ™ 1 , by a breadth all round of 10 mm , and a height of 7-5 11 ™ 1 ; the breadth of 

 the mantle brim was I-o™™, the height of the rhinophores 2 mm , of the gill 3 mm ; the breadth 

 of the foot was &-b mm , the length of the tail scarcely l mm . — The colour of the back 

 was upon the whole red-brown, somewhat spotted; the rhinophores and the gill were 

 darker; the foot was reddish, the sides of the body grayish. 



The form was as in other Doriopsides. The back was smooth, the mantle brim 

 not broad, bent in an undulating manner; the rhinophores were situated very anteriorly, 

 the gill very posteriorly; the former were provided with numerous thin leaves, the latter 

 was formed of 8 leaves, the strong, reddish yellow anal papilla filled up the branchial 

 circle posteriorly. The point of the pharyngeal cone projected somewhat into the outer 

 mouth, tentacles were scarcely to be seen. The foot was as usual, the tail quite short. 



The central nervous system (together with the ganglia rhinophor, distalia) was 

 reddish yellow, in other respects as usual, only the lower commissures were longer than 

 usual, and so the pedal ganglia did not join each other; the roundish buccal ganglia 

 adjoining each other, and situated, as usual, before and between the salivary glands. — 

 The short-stalked eyes had a diameter of O-Så™ 11 , provided with a large lens. The oto- 

 cysts had a diameter of 0'12 mm , closely packed with otoconia of the common kind. 

 Slightly hardened spicules were not wanting in the leaves of the club of the rhinophores. 



