308 ALGiE INARTICULATE. [Dumont 



1. I. edulis, Bory, (esculent Iridcea); frond subcartilaginous 

 simple obovate or cuneiform rounded at the apex attenuated at 

 the base into a short stipes. — Grev. Alg. Brit, p. 158. t. 17. — 

 Halymenia edidis, Ag. Sp. Alg. v. 1. p. 202. — Dehsseria edulis, 

 Lamour. — Ulva edulis, Be Cand. — Fucus cdidis, Stackh. — Turn. 

 Syn. Fuc. p. 180, Hist. Fuc. L 114. E. Bot. 1. 1307. Hook, in 

 Fl. Lond. N. Series, cum Ic. 



Abundant on the rocky shores. $ . October. 



(Irid&a reniformis of Bory and Dr. Greville, will be found under Rho- 

 domenia in this volume.) 



43. Halymenia. Ag. Halymenia. 

 Frond nearly flat or cylindrical, gelatinoso-membranaceous, 

 of a pinky-red colour, more or less dichotomous, the segments 

 often laciniated. Fructification ; punctiform globules of seeds, im- 

 bedded in the central substance of the frond. Grev. Alg. Brit, 

 p. 161. t. 17. — Name «>?, ci\ig, the sea, and vftw, a membrane, — 

 sea-membrane. 



1. H. liguldta, Ag. (strap-shaped Halymenia'); frond gela- 

 tinoso-membranaceous almost plane irregularly dichotomous, the 

 axils rounded, the segments ligulate attenuated towards the 

 apex and often proliferous at the margin. Grev. — Ag. Sp. 

 Alg. v. 1. p. 210 (and H. elongata of the same author). Grev. 

 Alg. Brit. p. 162. t. 17 .— Ulva ligulata, Woodw.—E. Bot. t. 429. 

 — Ulva rubra, Huds. 



Rocks and stones, chiefly on the southern coasts. Norfolk and Suf- 

 folk, and Anglesea. 0. Summer. 



2. H.furcelldta, Ag. (forked Halymenia); frond gelatinoso- 

 membranaceous cylindrical repeatedly and uniformly dichoto- 

 mous the segments obtuse, not unfrequently proliferous. — Ag. 

 Sp. Alg. v. 1. p. 212. Grev. Alg. Brit. p. 163. — Ulva furcellata, 

 Turn, in Schrad. Journ. v. 2.J9.301. E. Bot. t. 1881. — Dumon- 

 tia triquetra, Lamour. 



Rocks in the sea, chiefly on the southern and eastern shores of Eng- 

 land. Bantry Bay, Miss Hutchins. 



44. Dumontia. Lamour. Dumontia. 



Frond cylindrical, simple or branched, membranaceous, 

 tubular, gelatinous within, of a red or purplish-red colour. 

 Fructification ; globides of seeds, attached to the inner surface 

 of the membrane of the frond. Grev. Alg. Brit. p. 164. t. 17. — 

 Named in honour of M. Dumont, a contributor to the Diction- 

 naire a" Hist. Naturelle. 



1. jy.Jiliformis, Grev. (filiform Dumontia); frond gelatin oso- 

 membranaceous cylindrical attenuated at each extremity, pin- 

 nated with branches which are long scattered or subfastigiate 

 simple and attenuated at their base. — Grev. Alg. Brit. p. 165. 

 t. 17. — Dumontia incrassata, Lamour. — Halymenia filiformis, 



