See. GONGYLOSPERME^. ( 77 ) Fam. CEYPTONEMIACEJi;. 



Plate XCVI. 

 SCHIZYMENIA EDULIS.— /. G. Arj. 



Gen. Char. — Frond subcarnose-membranaceons, flat, composed of two strata : the inner 

 of longitudinal, anastomosing and interlacing, articulated filaments ; the outer 

 of cells, of which the inner are large, ovate, irregular, the outer smaller, and 

 disposed in moniliform vertical series. Fructification of two kinds, on distinct 

 plants : 1. Favellidia, more or less immersed in the substance of the frond ; 

 2. Tetraspores, tripartite or cruciate, scattered among the filaments of the 

 periphery. Name from trxiC'^, "I divide," and Ujurji^, "a membrane." 



ScHiZYMENiA eclulis. — Froiid carnoso- cartilaginous, thick and rigid, 

 obovate, gradually tapering into a short stem at the base, 



ScHizYMENiA cduUs. — /. G. AgarcUi, Sj). Gen. Alg. vol. ii. p. 172. 



Irid^a edidis. — JSory, in Bid. Class. d'Hist. Nat. vol. ix. p. 15; Grev. Alg. Brit. 

 p. 158, t. 17; Hooh. Br. Fl. vol. ii. p. 308; Wyatt, Alg. Danm. 

 No. 78; Endl. 3rd Suppl. p. 37; Kiltz. Phyc. Gen. p. 396; Harv. 

 in Mach. Fl. Hlb. part 3, p. 189 ; Harv. P. B. plate 97 ; Harv. 

 Man. p. 150 ; Harv. Syn. p. 123 ; Atlas, plate 47, fig. 215. 



Halymenia edidis. — Ag. SjJ. Alg. vol. i. p. 202 ; Ag. Syst. p. 242; HooJc. Fl. Scot, 

 part 2, p. 107 ; Spreng. Syst. Veg. vol. iv. p. 333. 



Delesseria edulis. — Laniour. Ess. p. 38. 



Ulva eduUs.~De Cand. Fl. Fr. vol. ii. p. 12 ; Orev. Fl. Edin. p. 298. 



Fucus edulis.— StacTc. Ner. Brit. p. 57, t. 12 ; With, vol, iv, p. 101 ; Turn. Syn. 

 vol, i. p. 180 ; Turn. Hist. t. 114 ; E. Bot. t. 1307 ; Hook, in FL 

 Lond. cum icone. 



Fucus dulcis. — Gm. Hist. Fuc. p. 189, t. 26 (figure only). 



Fucus lactuca. — Esepr, Ic. Fuc. vol, i, p. 129, t. 64. 



Fucus carnosus. — ScJimidel, It. p, 76 ; Esp. 1, c. p. 150, t. 76. 



Fucus palmaius, j8. — Light/. Fl. Scot, p. 935, 



Hab. — On rocks and stones and old shells, near low-water mark. Perennial, Fruit 

 in winter. Common all round the British Islands. 



Geogr. Dist. — Atlantic shores of Europe; Baltic Sea; 'M.a.]aga, (Ag.), 



Description. — Root, a broad flattened disc. Stem short, a quarter of 

 an inch to an inch long, gradually tapering into the wedge-shaped base of 

 the frond, which is obovate, broad, and rounded at the extremity, margin 

 plane and entire, very slightly if at all waved ; such is the normal form, 

 but wide alterations frequently occur. The base is generally long and 

 tapering, from about one-third to the summit, but frequently it is so 



