129 



fastigiata, Bliimenbach's Man., p. 273. Fleming's Brit. An., 

 p. 539. Ceilaria plumosn, Ellis and Solandcr's Zooph., 

 p. 21. Crisia fastigiata, Templeton in Mag. Nat. Hist., 

 vol. 9, p. 468. Acamarchis piumosa, Johnston's Brit. Zooph., 

 p. 294, pi. 39. 



Hab. At short distances from the shore, on rocky ground. 

 Polperro, rare. Falmouth, Miss Warren. 



This confervoid species attains the height of four inches, 

 but is more commonly found about two and half or three. 

 It is calcareous, of a delicate fJesh colour, fading in death 

 to white, and is dichotomously branched. The branches are 

 slender, and composed of two rows of alternating cells, all 

 opening on the same surface. The cells are oblong, dia- 

 phanous, like porcelain, polished, with a spine on the upper 

 and outer angle. The ovaries are pear-shaped and situated 

 over the apertures. This species is liable to so much dis- 

 figuration that it is not easy at all times to detect it. I have 

 procured many specimens in such a state that it was found 

 impossible to decide on their specific characters ; and it was 

 not till the examination of a tolerably perfect specimen shown 

 me by Miss Warren, of Flushing, that the specific characters 

 were identified. In old specimens the cells become obsolete 

 and the branches deformed and stunted. 



Dr. Johnston has arranged it as Acamarchis instead of 

 Cellularia, but as the characters have a great degree of same- 

 ness in description as well as figure it is here united with 

 Cellularia. To the experienced naturalist, however, there 

 will appear characters which approach to Flustra, but not 

 more so than in C. avicularia, and both are here united 

 in one genus. 



FARCIMIA. 



Generic Character: Polypidom rooted, plant-like, cal- 

 careous, dichotomous ; the branches cylindrical, regularly 

 jointed, with immersed rhomboidal cells diverging from 

 the axis, disposed in quincunx, and opening on the surface; 

 the apertures lateral, plain, non-operculate. 



FARCIMIA SALICORNIA. Branches composed of one 

 cylindrical articulation, jointed only at their origins and 

 terminations ; surrounded wiih lozenge shaped cells. 

 PI. xx., fig. 3. 



Corallina fistulosa fragilis, Raii, Hist., vol. 1, p. 65. 

 Bugle Coralline, Ellis' Coral., p. 46, pi. 23. Tubularia fis- 

 tulosa, Turton's Lin., vol. 4, p. 666. Stewart's Elem., vol. 2. 

 p. 4Jj8. Cellularia farciminoides, Ellis and Solander's 

 Zooph., p. 26. Farcimia fistulosa, Fleming's Brit. An., 

 p. 534. Salicornia fistulosa, Templeton in Mag. Nat. Hist., 

 vol. 9, p, 469. 



