Ser. MELANOSPERME.E. ( 89 ) Fam. DICTYOTEiE. 



Plate CLXIL 

 STKIAEIA ATTENUATA.— (7rei^. 



Gen. Chae. — Frond cellular, membranaceous, tubular, tube continuous. Fructification : 

 groups of naked roundish spores, forming transverse rings round the frond. Name 

 from strice, "lines," in allusion to the transverse lines of fructification. 



Striaeia attenuata. — Frond filiform, much branched ; branches mostly- 

 opposite or ternate, much attenuated towards each end. 



Striaria attenuata. — Grev. Crypt. Fl. (syn.) p. 44; Alg. Brit. p. 55, t. 9; Eooh. 

 Br. Fl. vol. ii. p. 279 ; Harv. in Maclc. Fl. Hib. part 3, p. 176 ; 

 Wyatt, Alg. Banm. No. ICO; Meneg. Alg. Ital. et Balm. p. 157 ; 

 /. Ag. Alg. Medit. p. 41 ; Fndl. 3rd Suppl. p. 26 ; Kutz. Phyc. Gen. 

 p. 336, t, 21, f. 2 ; Earv. in Hooh. Journ. Bot. vol. i. p. 298 ; 

 3I'CaUa, Alg. Hib. No. 18 ; Earv. P. B. plate 25 ; Earv. Man. p. 41 

 Earv. Syn. p. 35; Atlas, plate 11, fig. 41; /. G. Agardh, Sp. Gen. 

 Alg. vol. i. p. 80. 



ScYTosiPHON olivascens. — Carm. MSS. 



Carmichaelia attenuata. — Grev. Sc. Crypt, t. 288. 



ZoNARiA Naccariana. — Ag. MSS. ; Nac. Fl. Yen. vol. vi. p. 94 ; Alg. Adr. p. 82. 



ZoNARiA lineolata. — Ag. in Biar. Ratisb. 1827 ; Ag, Alg. Eur, t. 40. 



Stilophora crinita. — Ag. Aufzahl. p. 17 ; Nac. Fl. Yen, vol, vi. p. 94 ; Alg. 

 Adr. p. 83. 



SoLENiA crinita. — Ag. Syst, p. 186. 



SoLENiA attenuata. — Ag. Syst, p. 187. 



Ulva attenuata. — Nac. Fl. Ven. vol. vi. p. 72. 



DiCTTOTA lineolata. — Grev, Syn. pi. 43. 



Conferva crinita. — Buck. Fl. Ven, p. 269. 



Hab. — Parasitical on the smaller Algse, growing usually beyond tide range. Annual. 

 Summer. Not uncommon all round the coasts. 



Geogr. Dist. — British Islands ; Coast of Sweden (Areschoug) ; Mediterranean Sea. 



Description. — Root, a minute disc. Fronds tufted, five to eight 

 inches long or more, and from a quarter of a line to one or two lines in 

 diameter at the middle, from which they are gradually attenuated to 

 each end ; main stem percurrent, much branched, almost from the 

 base, with mostly opposite, rarely alternate, frequently ternate pinnae, 

 exactly similar to the main stem, and these are again once or twice 

 pinnated with branches of a similar form, all much attenuated to each 



VOL. III. " 



