BPOBOCHNA4 i 



repeatedly pinnate; pinnae and pinnules capillary, exactlj 



opposft \ patent, Lamour. Ess. p. 25. | A 1 1. 1 9, PL V. Fig. L9.) 

 Dichloria viridis, Qrev, Sporochnus viridis, Ag, Chordaria 



viridis, Ag. Q-igartina yiridis, Lyngb. Fucus viridis, Esper. 

 Hah. Iii the sea, growing on Btones an Ithe larger Aigse between 



ti Le-marks, and below low-water murk. Annual. Spring 



and early summer. Not uncommon. 

 There is no British Uga with which this can well be 

 confounded. The delicacy of its capillary ramuli, the 

 exact opposition of all it> parts,from the primary branches 

 to the most minute o\' the decompound ramuli, and the 

 versatile colour, arc all marks which peculiarly belong to 

 >r<s('nr viridis. Old ami weather-beaten fronds, 

 which have lost the more delicate ramuli, have something 

 the aspect of Dictyosiphonfceniculaceus, hut may he dis- 

 tinguished by the opposite branching. In the Atlas is re- 

 presented one of the growing points of tin 1 young frond, 

 magnified, showing the gradual coating of the confi 

 framework (or skeleton) <A' the frond. The younger por- 

 tions consist of a simple string of cells, or articulated fila- 

 ment, and in the lower part these cells are coated by a stra- 

 tum of much smaller cellules. As the growth proceeds, 

 these external coats are increased, while the original cen- 

 tral skeleton may still be traced, in the branches, and even 

 in the stem. 1). viridis is very widely dispersed through 

 the colder zones, and increases in luxuriance as it ap- 

 proaches either pole. 



Yin. AETHEOCLADIA. 



20. villosa {'Hie hairy Arthrocladia) ; frond filiform, cellular, 

 with an articulated, tubular axis, nodose; the nodes pro- 

 ducing whorl- of delicate, jointed filaments. Fructification, 

 pedicellate, moniliform pods, borne on the filaments, and 

 containing, at maturity, a Btring of elliptical spor 

 Mem. C r^n*. p. 18. (An ls, PI. V. Fig. 20.) 

 Elaionema rillosum, Berk. Sporochnus villosus, Ag, Conferva 



villosa, llnds. 

 Jlnh. On submarine rock-, shells etc., and on Zostera^in four 

 ot five fathoms water, rare. Annual. Summer and autumn. 

 tm coasts of Englan I, not uncommon. 

 This elegani plant, which was formerly included in the 

 genus Sporochnus, has a much closer connection with 

 Desmarestia, both in habit and in structure, and it la 

 probable that the fruit of Destnarestia may prove to hie 



