133 



Cor., p. 87, no. 5, pi. 32, fig. d D. Alcyomum gelatinosum, 

 Ellis and Solander's Zooph., p. 176. Turton's Lin., vol. 4, 

 p. 653. Fleming's Brit. An., p. 517. Lamouro-ix's Cor. 

 Flex., p. 350. Stewart's Elem., vol. 2, p. 432. Johnston's 

 Brit. Zooph., p. 300, pi. 41, figs. 1—3. 



Hab. On shells and stones from deep water; not rare on 

 the south and south-west coast. 



This species varies'in height to sixteen inches, and is said 

 sometimes to grow as high as " several feet; " in its texture 

 it is spongy or fleshy, semi-opaque, dotted, and of an amber 

 colour, varying from the light yellow, to the brown tint; 

 the surface is even, smooth, polished, lobulated, and dotted ; 

 the polypes lie beneath the surface in the substance of the 

 polypidom, with which they are very intimately connected. 

 The tentacula, though of very unequal length, are long, 

 ciliated, capable of being folded up, and so withdrawn into 

 the cell ; in the earliest state of growth, it is a simple in- 

 crustation, but soon assumes a finger-like prolongation, from 

 which lobes afterwards sprout on all sides. 



This was considered a vegetable by the older botanists ; 

 Ray thought it a Fucus ; Ellis appears to be among the first 

 to have discovered its true character. 



A. HIRSUTUM. Polypidom fleshy, simple or lobed, 

 compressed, surface granular. 



A. hirsutum, Fleming's Brit. An., p. 517. Johnston's 

 Brit. Zooph., p. 303, pi. 42, figs. 1, 2. 



Hab. On fuci about low water mark, and on a Pinna 

 ingens from deep water. Polperro, Tallandsand bay, Meva- 

 gissey bay. 



All the specimens of this species which I have found in 

 the Cornish seas, were long, slender, very much compressed, 

 semi-transparent, and fleshy, with a slightly granular surface, 

 clouded with brown, and marked with black specks; but it 

 is said to be sometimes sub-cylindrical and palmate. It is 

 soft and flexible. Its structure is cellular, the cells delicate 

 and compactly arranged. The granulations of the surface 

 are formed by minute conoidal papillae, which are closely 

 crowded together. The tentacula vary in number from six- 

 teen to eighteen. 



A. SUBVIRIDE. R. Q. C. Massive, lobulated, of a 

 brownish green colour ; surface irregular, covered with 

 small pores, interspersed with larger ones of very irregular 

 shape. 



Hab. From deep water, off the Dead man point. 

 When recent and living, it is generally of a greenish 



orange, but is sometimes of an olive brown or green colour, 



R 



