130 DE. CUTHBEET COLLINGWOOD ON SOME NEW SPECIES OF 



clearly defined black spots of Chromodoris Tryoni, as compared with the yellow blotches 

 in C. aureo-purpurea and other particulars noted by Bergh, give me reason to regard 

 that now described from the China coast as entitled to specific rank. 



Chromodoris tumulifera, Coll., n. sp. (Plate IX. figs. 23-26.) 



Length f inch. Body oblong, depressed, obtuse at either end. Mantle ample, covering 

 the whole body, except the posterior portion of the foot ; entire, tuberculated. Dorsal 

 tentacles smooth and delicate, club-shaped, the club-shaped extremities very finely lami- 

 nated, and twice as long as the cylindrical pedicle. Branchice small, consisting of nine 

 simple leaflets, the anterior largest, and diminishing in size posteriorly, the two hindmost 

 being rudimentary. Head crescentic, with two acute angles forming small tentacles, 

 one on either side. 



Colour and general appearance. — Mantle translucent yellowish white, the upper surface 

 irregularly strewed with large, roundish, well-defined tubercles of a rich carmine colour 

 and tumuliform profile. Round the mantle runs a broadish band of chrome-yellow, 

 defined exteriorly, but somewhat fimbriated interiorly, leaving a narrow edging of the 

 mantle tint all round the outside : upon this edging are two carmine spots on the anterior 

 and two on the posterior angles of the mantle. The tentacles and branchial are of the 

 same tint as the mantle, the latter delicately formed and difficult of observation. 



One specimen of this liandsome species found under a moderate-sized rough stone on 

 the south side of Slut Island, Haitan Straits, coast of China, in June. It was a somewhat 

 inactive animal, moving but slowly, but swimming occasionally foot uppermost on the 

 surface. 



In August of the same year, being on the island of Labuan, on the very opposite side 

 of the China Sea, I met with this species more than once, at Pulo Pappan and Pulo Daat, 

 two islets between Labuan and the mainland of Borneo. These specimens were about 

 the same size as the Chinese one, but differed in that the carmine tubercles were more 

 numerous and encroached upon the chrome border ; the branchiae also were more deve- 

 loped, and I was led to imagine that the specimen figured was a young individual. 



In colouring, this animal bears some resemblance to the Doris petechialis, Gould * ; 

 but this latter is 2 \ inches long, \\ inch broad, has vermilion-coloured tentacles, pinkish 

 branchiae, a more lemon-coloured margin and partially slate-coloured dorsum, and its 

 habitat is Honololu, Sandwich Islands. Dr. Gould admits his drawings are somewhat 

 imperfect, but sufficient for identification of the species. 



The deep carmine spots recall the black ones of Garrett's Chromodoris Tryoni, I. c, but 

 in other respects the two cannot well be confounded. 



Curomodoris tenuis. Coll., n. sp. (Plate IX. figs. 27-29.) 



Length f inch. Body long and slender, very attenuated when in motion. Mantle 

 entire, covering the whole body, excepting the posterior portion of the foot ; broad and 

 squarish in front, and narrower from behind the tentacles backwards, bluntly pointed 

 posteriorly. Dorsal tentacles short and club-shaped, laminated, the suture anterior. 



* U. S. Explor. Exped. Moll. vol. xii. p. 296 : Atlas, pi. 22. fig. 391. 



