136 DE. CUTHBEET COLLINGWOOD OX SOME NEW SPECIES OF 



the mantle. Dorsal tentacles of a rich rose-colour, the footstalks paler. Underside of 

 mantle pale rose, and underside of the foot inclining- to yellowish. 



One specimen, found under a stone hetween tide-marks in Singapore harbour, immedi- 

 ately west of the town, in December. It was sluggish in habit, and crawled slowly, but 

 floated upon the surface foot uppermost. 



This specimen died in the vessel of water, discolouring the fluid of a pink tinge/which, 

 however, did not appear to injure two Planariae in the same water. 



Two figures of this species occur in Sir "VV. Elliot's 'Madras Nudibranchs '*. One of 

 these, with black markings on the mantle, is supposed to be the typical specimen, and one 

 of a more pure rose-colour the variety. I am disposed to think, however, that the 

 present description will be found typical, and that those diverging into markings are 

 varieties. 



Family PHYLLIDIADvE, Lamarck (1809). 

 Genus Phyllidia, Cuvier (1708). 



Phyllidia spectabilis, Coll., n. sp. (Plate X. figs. 19-23.) 



Length 2 inches ; greatest breadth f inch. Body oval, tuberculated, covered with the 

 mantle. Tentacles two, short, placed near together, rather more than | inch from the 

 anterior extremity of the mantle, tapering, slightly curved, laminated, black, retractile 

 within a simple fixed sheath, which is situated on one of the tubercles of the mantle. 



Upper surface covered with numerous irregularly-shaped tubercles, arranged in groups 

 of from one to ten or twelve, these clusters each perfectly distinct and similarly coloured. 

 The ground of the mantle is jet-black and smooth, forming a network which ramifies 

 among the groups of tubercles ; the bases of these groups polygonal, of a pale emerald- 

 green colour, the most elevated kuobs being whitish. A narrow, black, irregular edging 

 surrounds the dorsal surface, enclosing all the groups of tubercles, outside which is a 

 smoother and paler, irregular, and very slightly tuberculated margin. Under surface — 

 Foot greyish, oval ; a small bitentaculated head in front, the tentacles immovable. A 

 narrow cleft bisects the posterior half-inch of the foot. Mantle ample, surrounding the 

 head and foot on all sides. At the junction of the mantle with the foot and on the under 

 eck-e of the mantle is a close row of lamelliform branchiae, small in size, the series sur- 

 rounding the whole body, except the head. 



This beautiful Phyllidia, in captivity, deposited a long, irregular, and narrow ribbon of 

 spawn, of a whitish colour, from an aperture in the side of the body. One specimen, 

 found under a block of coral between tide-marks on Pulo Barundum (or Marundum), 

 west coast of Borneo. 



Doubts might be expressed whether this species may not come rxnder that named 

 Phyllidia ptistulosa, Cuv., P. verruculosa, Cuv., and Phillidiella pustulosa, Berghf. If 



* Alder and Hancock, Trans. Zool. Soc. vol. v. p. 12G, pi. xxxi. figs. 1 and 2. 



t See Cuvier, Ann. du Mus. (1804) vol. v. p. 268, pi. sviii. A. fig. 8 ; Mem. p. 3. fig. S ; also Bergh, Monog- 

 p. 511, and in Sernper's Eeisen im Arehip. d. Philipp. Band ii. Heft 10, p. 3^2. 



