S P K L E R O C O C C U S c e i s t a t u s .
Crested Sphceroeoecus.
Class and Ohdeh CRYPTOGAMIA ALGA:, £{»»l_Nat. Obi». ALGM,
De Cand, Grev.
G EN E R IC CHARACTER.
Frons plana, plerumque rubra. Fructificaiio simplex, tubercuh globosa.
Frond plane, mostly red. Fructification simple, globose tubercles.
S P E C IF IC CHAHACTEH.
Sph.erococcus cristatusj^ronife membranácea, subdichotoma, avenía; ramis aU
ternis, decurrentibus, apice incisis, plerumque. dilatatis; tuberculis ad apices
marginemque sessilibus.
Sph . fro n d membranaceous, subdichotomous, v e in le ss ; branches alternate,
d e cu rren t, cu t, a n d mostly d ila ted tow a rd s th e a p e x ; tu b e rc le s sessile at
th e a p ex a n d margin.
Sphzerococcus c rista tu s, Ag. Syn. p. 29.—Lyngb. Hydroph. Dan. p. 13. t. 4.
•^Grev. FL Edin. ined,
F ucus cristatus. Herb. Linn— Turn. Hist. Fuc. t. 23. excl. v. y.—Tonn. Amoen.
Acad. V. 7- p . 477.
F ucus g ig a rtin u s ? FI. Dan. t. 394.— Hist. Isl. p . 2V¡.fide Fries.
H ab. Sea-shore, very rare. Firth of Forth, on the larger marine plants.
Between Newhaven and Caroline Park. August.
Boot a smaU callous, from w h ich arise several fronds lik e Delesseria alata,
of a fine re d colour. Frond membranaceous, 1 -2 inches lo n g , b ra n ch ed
in ra th e r a crow d ed a n d sp re ad in g manner. Branches ab o u t a line broad,
plan e , a lte rn a te, d e cu rren t, d ila ted u pw a rd s, c u t or even lacJniate a t th e
apex, th e lacinise spreading, ra th e r obtuse. Fructification sessile, d a rk
re d , spherical tu b e rc le s, e ith e r a t th e m a rg in o f th e branches, or a t th e
apex o f th e lacini®, an d con ta in in g sporules. Substance, w h en recent,
somewhat c artila g in o u s ; w h en d ry , membranaceous, a n d ad h e rin g very
closely to paper.
I t is with considerable satisfaction that I present the British
botanist with a representation of the true Sphwrococcus
cristatus; for, with all deference to the known acuteness and
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