Sek. G0NGYL0S?ERME.'E. ( 27 ) Fam. RHODYMENIACEiR. 



Plate LXXV. 

 CHYLOCLADIA ARTICULATA.— (^re^;. 



Gen. Char. — Frond gelatinoso-membranaceous, cylindrical or compressed, continuous or 

 constricted, as if jointed ; the cavity occupied by a tbin watery fluid, and traversed 

 longitudinally by a few slender-jointed fibres ; periphery consisting of small oblong 

 cells, smaller towards the surface. Fructification of two kinds, on distinct 

 plants: 1. Ceramidia, sessile on the upper ramuli ; 2. Tetraspores, tripartite, 

 imbedded in the upper ramuli. Name from X"^^^) "juice;" and K\dSos, "a 

 branch," referring to the structure. 



Chylocladia articulata. — Frond tiibular, very much constricted, and 

 branched from the constrictions ; naked below, pinnate or dichotomous 

 upwards, frequently fastigiate; capsules conical, trancate, with a terminal • 

 pore. 



Chylocladia articulata, — Grev. in Hook. Br. Fl. vol. ii. p. 298 ; Wyatt, Alg. 

 Banm. No. 73 ; Ilarv. in Mack. Fl. Rib. part 3, p. 200 ; Harv. P. B. 

 plate 283; Harv. Man. p. 102 ; Harv. Syn. p. 88 ; Atlas, plate 33, 

 fig. 147. 



LoMENTARiA articulata. — Lyngi. Hyd. Dan. p. 101, t. 30 ; Endl. 3rd Suppl. 

 p. 43 ; Kiltz. Phyc. Gen. p. 441. 



CHOHDRrA articulata. — Ag. Sp. Alg. vol. i. p. 357 ; Grev. Fl. Ed. p. 291 ; Spreng. 

 Syst. Veg. vol. iv. p. 342, 



GiGARTiNA articulata. — Lamour. Ess. p. 49. 



Focus sericeus, var. — Esper, Ic. Fuc. vol. i. t. 82. 



Fucus articulatus. — lAghtf. Fl. Scot. p. 959 ; Smith, E. Bot. t. 1574 ; Stack. Ner. 

 Brit. p. 28, t. 8 ; Turn. Syn. p. 383 ; Turn. Hid. t. 106. 



TJla'a articulata. — Huds. Fl. Angl. p. 569. 



Hab. — On rocks and Algfe, between tide-marks. Annual. Summer. Common. 



Geogr. Dist. — Atlantic and Mediterranean shores of Europe. 



Description. — Root composed of branching fibres. Frond two to 

 ten inches in length, about a line in breadth, tubular throughout, and 

 filled with a watery fluid, the tube longitudinally traversed by a few 

 fibres, and veiy much constricted ; five to six or seven times pinnated, 

 or occasionally dichotomous, especially towards the summit, where the 

 branches often become fascicled or whorled ; the lower joints three to 

 five times longer than broad, shorter upwards, oblong, obovate or 

 elliptical ; the ultimate ones roundish. Structure : central tube large, 

 traversed longitudinally by a few filaments ; outer cells small, the inner 



