\ \ \ i ?■' ! i i I
1 1 I f /
\ \ m ¥ ¡ y
/ /
Recvo & Niàuxls , imp .
P l a t e CCCXXXIV.
CERAMIUM STRICTUM, Mt z . (sp.)
G e n . C h a r . Frond f il if o rm , o n e - t u b e d , a r t i c u l a t e d ; t h e d i s s e p im e n t s
c o a t e d w i t h a s t r a t u m o f c o lo u r e d c e l l u l e s , w h i c h s o m e t im e s e x t e n d
o v e r t h e s u r f a c e o f t h e a r t i c u l a t i o n . Fructification o f tw o k i n d s , o n
d i s t i n c t i n d i v i d u a l s ; 1 , tetraspores, e i t h e r im m e r s e d i n t h e r a m u l i , o r
m o r e o r l e s s p r o t r u d e n t ; 2, s e s s i le , r o u n d i s h receptacles {fa v e lla )
h a v i n g a p e l l u c i d l im b u s , c o n t a i n i n g m i n u t e , a n g u l a r s p o r e s , a n d
s u b t e n d e d b y o n e o r m o r e s h o r t , i n v o l u c r a l r a m u h . O b b a m iü m
[Both),— f r o m sepapos, a pitcher-, b u t t h e f r u i t i s not p i t c h e r - s h a p e d .
C e r a m iu m strictum ; frond capillary, nearly equal, membranaceous, irregularly
dichotomous, the lower forkings distant, the upper closer, all
the divisions erect and straight, with narrow, acute axils ; the apices
straight or slightly hooked inwards; articulations colourless, those
of the lower dichotomies from three to four times as long as broad,
of the upper gradually shorter ; dissepiments (smooth or hairy) opake,
purple; favellæ near the tips of the branches, involúcrate; tetraspores
erumpent, bursting from the dissepiments of the larger
branches, quadrifarious.
C e r a m iu m strictum, Harv. Man. ed. 3. p. 164.
G o n g k o c b b a s strictum, Kiitz. in Linruea, 1 8 4 2 , p. 7 3 5 . Phyc. Gen. p. 3 8 0 .
Sp. Alg. p. 6 7 8 .
H a b . On mussel-shells, corallines, &c.; in tide-pools, near low-water
mark. Torquay, Mrs. Griffiths. Penzance, Mr. B a lfs. Plymouth,
Mr. Boswarva and B r . Cocks. Jersey, Miss Turner. Dingle, Kerry,
W. H . H . Eoundstone, Mr. M'Calla.
G e o g r . D i s t r . German Ocean, Kiitz.
D e s c e . Filaments capiUary, from two to four inches high, densely tufted, the
bases of the tufts entangled, from the presence of in-egular creeping fibres.
Filaments of nearly equal diameter throughout, dichotomous, without
n-incipal stem, but sometimes furnished with a few lateral ramuli; the
ower dichotomies distant, the upper closer ; all the segments of the filament
straight and erect, the axils acute and narrow ; the apices more or
less fastigiate, generaUy sharply bifid, with the points incurved, but not
strongly involute. Articulations of the middle and lower portions three to
four times, of the upper twice as long as broad, and of the ulthnate and
penultimate forkings much shorter than their breadth. Dissepiments coated
with dense, minute, purple cells, slightly swollen, either quite smooth, or
(when young) clothed with copious, long, slender, flexible hairs. ”