'290 ALGJE INARTICULATE. [Rhodomenia. 



and the fructification, besides its greater thickness, at once remove it 

 from that plant." Grev. — This species I am unacquainted with.' 



4. R. Palmetto,, Grev. (small palmated Rhodomenia) ; stipes 

 short terete, frond subflabelliform more or less deeply divided 

 in a somewhat palmated manner, the segments oblong- or cuneate 

 bifid the :ils rounded the margins entire, capsules in the disk 

 and margin, scattered granules forming a cloud at the extremity 

 of the segments — Grev. Alg. Brit. p. 88. t. 12. — Sphairococcus 

 Palm., Ag. Sp. Alg. v. \.p. 243. — Delesseria Palm., Lamour., — 

 Fucus Palm., Esp. — Turn. Syn. Fuc. p. 21, Hist. Fuc.t. 73. 

 E. Bot. t. 1120— Fucus bifidus, Huds. 



On rocks and the stems of the larger Fuci, especially on Laminuria 

 digitata, chiefly in the south of England. Bantry, Miss Hutchins. 

 Miltown Malbay, abundant, Mr. Harvey. 0. Summer and Autumn. — 

 Of a fine deep rose colour ; the texture somewhat cartilaginous, so 

 that the specimens, in general, do not adhere to paper. Length from 2 

 to 4 or 5 inches ; the taller and narrower specimens have much the 

 appearance of Sphairococcus membranifolius ; but, as Dr. Greville re- 

 marks, the latter has always a livid purplish hue, and the fructification 

 is very diffi rent. 



5. R. cristdta, Grev. (crested Rhodomenia) ; frond semicircu- 

 lar membranaceous subdichotomous, the segments somewhat 

 dilated upwards repeatedly subdivided, the divisions alternate 

 decurrent laciniate at the ends, capsules sphserical imbedded in 

 the margin of the frond. Grev. Alg. Brit. p. 89. — Sphairococcus 

 cristatus, Ag. Sp. Alg. v. 1. p. 300. Lyngb. Hydroph. Dan. 

 t. 4. Grev. Crypt. Fl. t. 5. — Fucus cristatus, Linn. Herb. — 

 Turn. Hist. Fuc. t. 23, (excl. the var. y.) — (3. frond harrow 

 linear throughout. Turn. I. c. 



In the sea, upon the stems of Laminaria digitata. Firth of Forth, Dr. 

 Greville. — /3. On the shore at Wick, Caithness, Borrer and Hook. Ber- 

 wick, Dr. Johnston. 0. July. — This is certainly a rare species, and I am 

 not aware of any other stations than those just mentioned. The var. (Z. 

 (Turn.) is perhaps the same as Fucus Bangii of Flora Danica, t. 1477. 

 The var. y. of Mr. Turner is a species of Rytiphlcea, Ag. (R. complanata, 

 Ag.) and not a native of Britain, that I am aware of, though stated, by 

 Agard/i, to be found in Ireland 



6. R. cilidta, Grev. (ciliated Rhodomenia) ; frond subcartila- 

 ginous more or less lanceolate dichotomous and pinnatifid with 



1 Since the above was written, I have seen a specimen from Mr. Arnott, 

 in the possession of Mr. Harvey; and I do indeed fully agree with the former, 

 who says, in a letter to me (and contrary to the opinion of Dr. Greville), 

 " I still think this is the Fucus Sarniensis of Mertens and Koth ; for in the 

 Catalecta Botanicaare figured distinct capsides very different from the fructi- 

 fication of the Genus Halymenia." — These capsules are indeed very obscure and 

 imperfect, as compared with those on Mr. Arnott's specimen, but 1 have no 

 hesitation in considering the two to be specifically identical ; and these are 

 both, in my opinion, much more nearly allied to JRhodom. sobolifera than to 

 palmata. At any rate, I am quite of opinion, that if R. Sarniensis be united 

 with JR. palmata, so must R. sobolifera and R. polycarpa. The real capsules 

 have only been found on this latter. 



