( BBAML4CE B. L39 



211. simplicifilum (The 



Blender, irregularly branched, whorled \vith imbricated, 

 Btraight, once-forked ramelli, Ag. s r . Alg. v. 2. p. L34. 

 L8, PL LIV. Fig. 2 17.) 

 Ceramium simplicifilum, DC. Halurus simplicifilum, A7-.. 

 JIah. On rooks, etc., near low water-mark, and at a i 

 depth. Annual. \'<r\ rare. 

 The characters by which this plant is to be known 



Uetifolia are, the more slender branches, the more 

 and Less frequently forked and straighter ramuli, 

 and the greater proportionate length of the articulations. 

 Usually the colour of G. simplicifilum is much br 

 than that of G. equisetifolia, but this character is not 

 always to be depended upon. 



212. barbata {The pencilled Qriffithsia) ; filaments dichotomous, 

 Blender; articulations Blightly pyriform, from fii 



tunes Longer than broad, those near the apices of the bra 

 emitting opposite or whorled, byssoid, dichotomous fibres 

 (or ramuli) to which the tetraspores are attached: favelke 

 stalked, Ag. Syst. p. 145. (Atlas, PL LV. 1 i_i. 250.) 

 Conferva barbata, E. Bot. 



J!*/ 1 *. Parasitical on the smaller Alga?, in tide-pools. Annual. 

 Summer. Very rare, and Beeminglj confined to the < 

 of the British Channel. 

 It is only necessary to glance at the figure of this Bpecies 

 and compare it with those of the other species of Griffith' 

 s'ut. to see the strong characters by which the present is 

 distinguished. Here the lew last articulations of all the 

 branches are furnished with slender, byssoid fibres, and on 

 these libre> the letraspores are borne. In tenuity of frond 

 there is a resemblance to G. Devomensis, and in the pyri- 

 form articulations to c. coraUina i hut the s ramuli 

 are peculiarly its own. 



243. Devoniensis ( 7" ' iffithsia) \ Slam* 



Blender, gelatinous, flaccid, dichotomous, tin- Lower 

 patent, the upper acute; articulations cylindrical, 7 8 

 times as Long a- broad; joints constricted; invol 

 whorled round the joints <>f the branches, Harv. rim. . 

 pi. L6. (Atlas, PL LV. Pig. 251.) 

 Hah. South of Englan I. Afuddj sea-shores, in deep water: rare. 

 '.. !> v niensis belongs to the section of tic genus ty- 

 pified by G. corallina, from which species the smaller 

 aize, more slender filaments* and cylindrical articulations 



