9-2 



h.ive been procured. It varies in hei'jiht from four to twelve 

 inehes, bni tlie Cornish specimens <liil not exceed six. It is 

 rather delicate, and of a semi-transparent horn colonr in- 

 clining: to pink when livins:, chanp;inj; to a deeper and duller 

 colour in dyinjr. The branches, which are widely separated 

 from each other, are sjiven oif alternalelv. The cells are 

 opposite, pellucid, attached to the polypidom by the base, 

 the upiier half beinsj free and divergent, and distributed in a 

 biserial manner; their apertures are patulous, with two lateral 

 tooth-like inequalities. The vesicles are unilateral and arise 

 from the base of the upper row of cells; they are shortly pe- 

 dunculated, stout, lon;j;itutinally furrowed, and their apertures 

 are s'mall and tubular. They vary in shape according to age. 

 When younsc they are urn shaped with tubular apertures; a 

 liltle older, the rim at the base of the neck becomes enlarged 

 and sharp-sdsjed, with two small horns ; when old, the neck 

 and month disappear after the ova have escaped, and the 

 margin becomes irregularly festooned. 



SEA FIR. S. Abietina. Cells very nearly opposite, 

 tubular, slightly bellied at the b;>se; mouth simple and 

 unarmed ; the upper half free : vesicles ovoid with a neck. 

 Corallina marina Abietis forma. Miiscus marinus major 

 argute (len)iculatis Rail Synop. Slirp., vol. 1, p. 35, no. 12. 

 Sea Fir, Ellis' Cor., p. 4, pi. 1, hg. b, 15., no. 2. Dyna- 

 mena Abietina, Fleming's Brit. An., p. 543. Sertularia 

 Abietina, Ellis and Solander's Zooph,, p. 3G, no. 2. La- 

 monroux's Cor. Flex., p. IBG and 187. Turton's Lio., vol. 4, 

 p. 67(5. Blumenbach's Man., p. 273. Stewart's Elem vol. 2, 

 p. 441. Templeton in Mag. Nat, Hist., vol. 9, p. 4GU. John- 

 ston's Brit. Zooph., p. 130, pi. x., fig. 1, 1. 



Ilab. On stones, shells and Gorgonia verrucosa, common, 

 from deep water. In the Fowey river, ou stones and shells. 

 This species varies in height from four to eight inches, 

 t^rowino^ in great luxuriance on Pinnce, at from six to nine 

 leatiues south of the Deadman point; and less so near the 

 shores, where it is generally in an injured stale, having the 

 branches and cells knocked off by the violence of the waves. 

 In a perfect state the polypidom is of a light brown colour, 

 polished, compressed laterally, slightly bent, and has cells 

 both on the branches and trunk. The branches which are 

 about as large as the trunk, arise in an alternate manner, and 

 more closely together than in the last species. Tiic cells are 

 scmi-alternalo, bellied at the base, with contracted and 

 everted apertures, and are attached only at the base, the 

 upper portion being free and diverging. The vesicles, which 

 are itvj iu number, small, and irregularly distributed, arise 



