HARVEY’S ILLUSTRATIONS. 299 
series gathered at different seasons, by which it appears that 
the form called “disticha,” is most abundant during the 
autumnal and winter months, though it is occasionally found 
in summer. 
Whether the S. disticha of Lyngbye and Agardh be really 
distinct, I have no means of ascertaining, never having seen 
an authentic specimen. 
5. Ectocarpus Mertensii. Ag.— Harv. in Hook, Br. Fl. v. ii. . 
p. 327. 
This most beautiful as well as very rare and little known 
plant has recently been added to the Devonshire Flora by 
Mrs.Griffiths, and Mrs. Wyatt, who gathered it at Tor Abbey 
and Harbrich in April of the present year (1834,) and Miss 
Cutler has since detected it at Sidmouth. Thus within a few 
weeks three new stations have been ascertained for this most 
interesting species,—a species indeed long known to botanists 
by the figure in ** English Botany" (¢. 999), but, until now, 
existing in very few herbaria. It may confidently be ex- 
pected to occur in many other places on the Southern shores 
of England: and as good specimens will I hope be published 
in the 3d vol. of the ** Algæ Danmonienses,” it will soon 
cease to be a little known plant. I regret that I cannot yet 
claim E. Mertensii as a native of Ireland. Bantry Bay is 
indeed given as a station on the authority of the late Miss 
Hutchins, but her specimens which, through the kindness of 
Mr. Mackay, I have lately had access to, belong to Æ. 
granulosus and E. spermophorus. | 
MYRIOTRICHÍA. Nov. Gen. 
(Alga minuta, parasitica. Frons diorgana, ex filis articu- 
latis, quorum alia olivacea opaca, alia hyalina crinoidea 
constans. ) ' 
Gen. Char.—Filum primarium olivaceum flaccidum (sim- 
plex), ramulis setiformibus quadrifariis obtusis obsessum, 
quorum apicibus filamenta crinoidea hyalina dichotoma 
