Seu. GONGYLOSrERME.E. ( 71 ) Fam. CRYPTONEMIACEiE. 



Plate XCIII. 

 FURCELLAEIA F ASTIGI AT A.— Lamour. 



Gen. Char. — Root fibrous ; frond cartilaginous, filiform, solid, the axis consisting of 

 closely packed, interlacing and anastomosing filaments, from which arise vertical, 

 dichotomous filaments, the inner cells of which are large OTal, the outer 

 smaller, cylindrical, closely packed. Fructification : 1. Favellse, formed from the 

 inner cells of the outer stratum ; 2. Tetraspores, pyriform, zonate, formed from 

 the outer large cells of the periphery, of elongate terminal pod-like receptacles. 

 Name horn furcuht or furcilla, " a little fork." 



FuRCELLARiA fiistigiata. — Lamour. Ess. p. 26 ; Ag. Sp. Alg. vol. i. p. 103 ; Ag. 

 Si/st. p. 274 ; Grev. Fl. Edin. p. 286 ; Grev. Alg. Brit. p. 67, t. 11 ; 

 Ilooh. Br. PI. Tol. ii. p. 233; Tf>(«, Alg. Damn. No. 106; Endl. 

 Srd Suppl. p. 38 ; Kiltz. Phyc. Gen. p. 402, t. 71 ; Harv. in Mach. Fl. 

 Hib. part 3, p. 190 ; Harv. Man. p. 147 ; Harv. Syn. p. 120; Atlas, 

 plate 45, fig. 208 ; Harv. N. B. A. part 2, p. 195 ; /. G. Agardh, Sp. 

 Gen. Alg. vol. ii. p. 196. 



FuRCELLARiA lumbricttHs. — Lamour. Ess. p. 26 ; Lynyh. Hyd. Dan. p. 48, t. 40 ; 

 HooTc. Fl. Scot, part 2, p. 97 ; Spreng. Syst. Veg. vol. iv. p. SI 5. 



Vccvs fastigiatus. — Huds. Fl. Angl. p. 588; Liyldf. Fl. Scot. p. 930; Gm. 

 Hist. p. 108, t. 6, f . 1 ; Good, ifc Woodw. in Linn. Trans, vol. iii. 

 p. 204 ; Turn. Syn. p. 317 ; Turn. Hist. t. 6 ; E. Bot. t. 824. 



Ytjcvs fuixellatus. — Linn. Sp. PL p. 1631 ; Huds. Fl. Angl. p. 589. 



IIab. — On rocks and stones in tidal pools. Perennial. Winter. Common. 



Geogr. Dist. — Atlantic shores of Europe and North America. Northern Ocean. 



Description. — Root composed of branching fibres. Stem cylindrical, 

 attenuated at the base, one to three inches long, and half a line to a line 

 in diameter, four to five times dichotomously branched ; the branches 

 cylindrical, nearly erect, with acute angles, terminating in elongate, 

 fusiform, acuminate, pod-like receptacles. Fronds three to ten inches 

 in length, veiy much tufted. Structure : axis occupying about two- 

 thirds of the diameter, and composed of articulated filaments, veiy much 

 interlaced and anastomosing ; articulations three to four times as long as 

 broad, from which arise vertical, dichotomous filaments, whose inner cells 

 are large, ovate or obovate, the terminal ones smaller, oblong, compact, 

 forming the surface. Substance cartilaginous, rather rigid and brittle, 

 not adhering to paper. Colour, a dark reddish purple. Favellse formed 



