Ectocarpus.] ALG.E CONFER VOIDED. 325 



Alg. v. 2. p. 30. — Conferva olivacea, Dillw. Syn. Conf. p. 57. 

 t. C. E. Bot. t. 2172. 



On rocks and the larger Algae. Orkney, Messrs. Borrer and Hooker. 

 Appin, Capt. Carmichael. Dunmore, Ireland, Miss Anne Taylor. — Three 

 lines to half an inch high, forming small tufts or patches. Agardh con- 

 siders it to come nearest to S. cirrhosa, and to be perhaps, not specifi- 

 cally distinct; in which opinion I am inclined to agree with him. 



9. S. racemosa, Grev. (racemose Sphacelaria); " filaments short 

 tufted olivaceous dichotomous, capsules ovate racemose pe- 

 dunculate." Grev. Crypt. Fl. t. 96. Ay. Sp. Alg. v. 2. p. 34. 



Firth of Forth, Dr. Richardson. — Allied to the last; but larger. The 

 branches, which Dr. Greville calls " dichotomous," appear from his 

 figure to be alternate. The most remarkable character lies in the race- 

 mose capsules. 



10. S. velutina, Grev. (velvet-like Sphacelaria); " olivaceous 

 spreading velvet-like, filaments subsimple erect very short bear- 

 ing- capsules at the base, joints about equal in length and 

 breadth." Grev. Crypt. Fl. t. 350. — Linkia velutina, Carm. 

 MSS. 



Parasitical on Himanthalia lorea and Funis terrains, whose fronds it 

 covers " in dark olivaceous velvety patches." — I admit this minute 

 parasite into the present genus, where it is certainly an intruder, 

 from respect to Dr. Greville's authority ; though I confess I agree with 

 Capt. Carmichael in considering it more allied to Linkia {Myrionema) 

 strangulans. 



58. Ectocarpus. Lyngb. Ectocarpus. 



Filaments capillary, olivaceous or brown, flaccid, without 

 longitudinal stride. Fruit, sphserical or siliqua-foini capsules, 

 and granules in swollen ramuli. — Name; sy.ro:, y-x^o-, external 

 (nut ; equally applicable to many other genera. 



• 



Second'//// branches alternate, fascicled <>r fecund. 



1. E. Uttordlis, Lyngb. (common Ectocarpus); filaments densely 

 tufted excessively branched, ultimate ramuli somewhat patent 

 alternate <>r fascicled, capsules spherical Bessile — Lyngb. ////- 

 droph. Dan. p. 130. /. :l'. 43. Ag, Sp. Alg. v. 2. p. 40. — Con- 

 ferva UttoraUs, Dillw. Conferv. U 81. /:'. Bot. t. 2290.— Lyngbya 



tit tor., da 1 1 It m. 



On the larger Algce t ver) common. 



2. E. siliculdsus, Lyngb. (poelfhsUed Ed r); filaments 

 flaccid and slender tufted, ultimate ramuli erect subulate alter- 

 nate or fascicled, siliqus lanceolate. — Lyngb. Hydroph. Dun. 

 j>. LSI. i. 43. Ag. Sp, Alg. v. 2. p.M. — Conferva tilicut 

 Dillw. Syn. p. <;«.»'. /. /■;. /:. Bot /. 2319. 



B o a shores! on algae, corallines, &c^ common.— A most polymorphous 

 ies, of which Agardh enumerates 6 varieties. It i-> usuaUj more 

 slender and flaccid, and "i ;i paler colour than the last; bu 



