134. DE. CUTHBEBT COLLINGWOOD ON SOME NEW SPECIES OE 



in a crescentic form as a veil ; the lateral papillae five on either side. These papillae 

 consist each of a conical stem with pinnae, the lateral papillae being about twice the 

 length of those round the head. Dorsal tentacles club-shaped, the upper half swollen 

 and finely laminated, upon a cylindrical pedicle. Branch he of five leaflets arranged 

 round the anal orifice upon an elevated portion of the body ; the anterior leaflet much 

 the largest, and the two posterior minute. Each leaflet simply pinnatifid, and feather- 

 like in general aspect. 



Colour and general appearance. — Body of a general pale orange-yellow, darker between 

 the tentacles and along the median line, spotted irregularly with minute dots of orange. 

 Upper half of the papillae with larger spots of orange. Pinnae translucent yellowish. 

 Branchiae pale orange-yellow. Tentacles spotted with orange about the central parts of 

 the laminated portion. 



One specimen found beneath stones near low-water mark, on Slut Island, Uaitan Straits, 

 coast of China, June 30th. It was rather sluggish in its habits, but swam on the surface, 

 foot uppermost. I have named the species from the resemblance of the branchiae to the 

 well-known crest of the Prince of Wales. 



Genus Trevelyana, Kelaart (1858)*. 

 Trevelyana felis, Coll., n. sp. (Plate X. figs. 12-14, immature.) 



Length % inch. Body simple, smooth, of a uniform scarlet colour, the intestines 

 showing darker upon the dorsal surface. Mantle indistinct, covering the entire body. 

 Dorsal tentacles two, perfectly simple, conical, scarlet. Branchice, none visible. 



Several specimens of this little animal occurred upon a stone in a tide-pool on the 

 basaltic shore of Makung, Island of Pong-hou, Pescadores, in May ; and in June, six 

 weeks later, I also found it on Slut Island, Haitan Straits. It was very active and flexible, 

 assuming at different times the most singular forms, resembling in turn a fox, a rabbit, 

 a cat, according to its different attitudes. It swims like the other nudibranchs on the 

 surface of the water, foot uppermost. I cannot speak with great certainty of it, but 

 believe it to be an immature species of Trevelyana, the trivial name being added to call 

 other observers' attention to it. Qu. In what respects does it stand to the T. (Stenodoris) 

 rubra, Peascf , from the Pacific ? 



Family DOBIDOPSID^E, Alder and Hancock (1864). 



Genus Doridopsis $, Alder and Hancock (1864). 



Doridopsis arborescens, Coll., n. sp. (Plate X. figs. 15-17.) 



Length If inch. Mantle capacious, enveloping the body, and overlapping the foot 

 laterally and anteriorly; the edges deeply cut and puckered all round; smooth and 



* Trevelyana, Kel. Journ. Asiatic Soc, and Aim. & Mag. Nat. Hist. 3rd ser. (1858) vol. i. p. 257. Messrs. Alder 

 and Hancock, Trans. Zool. Soc. vol. v. p. 132 (footnote) suggest that "this genus may possibly bo synonymous with 

 the Cfymnodoris of Stimpson, Proceed. Philad. Acad. Nat. Sc. 1855." 



t Amer. Journ. Conch, vol. ii. p. 206, pi. 4. fig. 2. 



J See " Indian Nudibranchiato Mollusca," Trans. Zool. Soc. vol. v. p. 124. 



