I
P la t e LXXXII.
m e s o g l o i a v i r e s c e n s , Carm.
I
G e n . C h a e . Frond filiform, muoli branched, gelatinous. Axis composed
of loosely packed, longitudinal, interlaced filaments, invested with
gelatine ; the periphery of radiating, dichotomous fflaments whose
apices produce clusters of club-shaped, moniliform fibres. Fructification,
obovate spores, seated among the apical fibres. M e s o g l o i a
(Ay.) from ficros, the middle; and yXoios, viscid; in ahnsion to the
gelatinous axis.
M o s o g l o i a virescens; frond flhform, gelatinous ; branches long, ^lender,
villous ; ramuli numerous, patent, short, linear, obtuse.
M e so g l o ia v ire sc en s, Carm. Alg. Appin. ined. Hook. Br. M. vol. ii. p . 3 8 7 .
Wyatt, Alg. Banm. n o . 4 9 . Berk. Gl. Alg. t . 1 7 . f. 3.
M e so g l o ia affinis. Berk. Gl. Alg. t. 1 6 . f. 3.
M e so g l o ia H o rn em a n n i, Suhr.? Kütz. Phyc, Gen. p . 3 3 2 ?
Trioholadia v ire sc en s, Harv. in Mack. M. Hih. p a r t 3. p . 1 8 4 .
H e lm in t h o c l a d ia v ire sc en s, Harv. Man. p 4 6 .
f t Zostericola ; frond brownish, simple, with a few short branches.
M e so g l o ia g ra c ilis, Carm. Alg. Appin. ined. Berk. Gl. A lg .t. 1 7 . f. 1.
Endl. 3 rd Suppl. p . 2 3 .
Mesogloia Zosteræ, Aresch.
E ivulaeia Zosteræ, Mohr, in Weber. Beitr. vol. ü. p. 367. Lyngh. Hyd.
Ban. p. 194. t. 66.
H a b . On rocks, stones, and Algæ, at half-tide level. Annual. Spring
and Summer. Common. West of Scotland, Carmichael, Rev. B .
Landsborough, fyc. North of Ireland, Mr. W. Thompson. West,
south, and east of Ireland, abundant. South coast of England, Mrs.
Criffiths, fyfl. f t parasitical on Zostera, at Appin, Capt. Carmichael.
Eoundstone Bay, Mr. Me’Calla.
Geoge. Dis t e . Northern shores of Europe. Baltic Sea. Atlantic coasts of
France.
Desce. Boot scutate. Frond îvotr four to twelve or fourteen inches in length, and
from half to nearly a line in diameter, cylindi-ical, filiform, equal in diameter
throughout its extent, with an undivided stem, densely clothed with lateral
branches. Branches issuing at short distances from each other, sometimes
as long as the stem, sometimes half as long, and in var. S- very short,
patent, resembling the main stem, and like it having numerous, lateral,
simple or forked, patent secondary branches. Every part of the frond
appearing villous to the naked eye from the great length, and little density
of the stratum of filaments, which form the periphery. These filaments are
irregularly dichotomous or somewhat fascicled ; their divisions moniliform.