Ser. GONGYLOSPERIMEJ;. ( 2!) ) Fam. RHODYMENIACE.E. 



Plate LXXVL 

 CHYLOCLADIA CLAVELLOSA.— (7m\ 



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

 constricted, as if jointed; the cavity occupied by a thin 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^^^^t "juice;" and KXddos, "a 

 branch," referring to the structure. 



Chtlocladia clavellosa. — Frond subfiliform, gelatinous, mostly dis- 

 tichous, thi-ee to four times pinnate ; all the divisions very irregular in 

 size and branching, and attenuated at each end ; capsules sessile, short, 

 urceolate. 



Chtlocladia clavellosa. — Grev. Hooh. Br. Fl. vol. ii. p. 297; Wyatf, Alg. Danm. 

 No. 23 ; JIarv. in Mack. Fl. Hib. part 3, p. 199 ; Barv. Man. 

 1st edit. p. 71; /. G. Agardh, Sp. Gen. Alg. vol. ii. p. 366. 



Chrystmenia clavellosa. — /. Ag. Alg. Medit. p. 107 ; Endl. 3rd Suppl, p. 42 ; 

 Earv. P. B. plate 114 ; Harv. Man. p, 100 ; Harv. Syn. p. 85 ; 

 Atlas, plate 30, fig. 136. 



Chondrothamnion clavellosum. — Kiltz. Phyc. Gen. p. 438, t. 53, f. 2. 



Chondrothamnion confertum. — De Not. 



Gastridium clavellosum. — Lyngh. Hyd. Dan. p. 70, t. 17 ; Grev. Alg. Brit. 

 p. 115. 



Gastridium purpurascens. — Lyngh. 1. c. p. 69, t. 17. 



Chondria clavellosa. — Ag. Sp. Alg. vol. i. p. 353; Ag. Syst. p. 206; ITooh. Fl. 

 Scot, part 2, p. 105; G)-ev. Fl. Edin. p. 291; Spreng. Syst. Veg. 

 vol. iv. p. 342. 



GiGARTiNA clavellosa. — Lamour. Ess. p. 49. 



Fuccs clavellosus. — Turn, in Linn. Trans, vol. vi. p. 133, t. 9 ; Turn. Syn. 

 p. 373 ; Turn. Hist. Fm. t. 30 ; Sm. Eyxg. Bot. t. 1203. 



Hab. — On rocks, stones, old shells, on the stems of Laminarice as well as some of the 

 smaller Algse, near low water and at a greater depth. Annual. Spring, summer, and 

 autumn. Common. 



Geogr. Dist.— Atlantic shores of Europe ; Baltic and Mediterranean Seas ; Tasmania. 



Description. — Root, a minute conical disc. Frond gelatinous, sub- 

 filiform, three to twelve inches long, and about a line in thickness in 

 tlie middle, very much bi-anched (from near the base) in a distichous 

 manner, three to four times pinnated ; branches very in-egular in size, 



