127 
This, compared with the last is a stout species. It is 
abundantly found towards autumn among the matted roots 
°f the larger fuci ; in these situations it grows in great pro- 
lusion so as to fill up every crevice. It is calcareous, white, 
and sometimes tinged with red, and rarely exceeds oue inch 
*n height, being more inclined to spread than rise. As it 
thus trails along, many of the branches come in contact with 
the substance on which it grows, from these points long 
slender tendrils arise, which firmly clasp the fuci and secure 
the polypidom in its situation. The cells are in the branches 
and do not stand prominently out as in the last species; they 
are alternate, and open by oval oblique apertures which have 
a stout blunt spine on the upper and outer rim. The aper- 
tures all face on one plane, and the lower portion of one 
Ufilice is immediately above the upper margin of another. 
CREEPING CORALLINE. C. Replans. Calcareous, 
creeping, diehotomously branched ; cells semi-alternate, 
with oblique apertures, armed with four or five spines at 
their outer rims. PI. xxiii., fig. 3. 
Creeping Coralline, Ellis’ Coral., p. 3", pi. 20, fig. b B. 
Sertularia reptans, Turton’s Lin., vol. 4, p.685. Stewarts 
filem., vol. 2, p. 443. Cellularia reptans, Fleming’s Brit. 
An., p. 540. Johnston’s Brit. Zooph., p. 291, pi. 33, figs. 3 
and 4 . Bellamy’s South Devon, p. 270. Crisia reptans, 
Templeton in Mag. Nat. Hist., vol. 9, p, 409. Lamouroux’s 
Cor. Flex., p. 140. 
Hub. On the roots of the larger fuci, every where 
c °mmon. 
This species is very similar to the last in its habits and 
s Pfeading character. It is calcareous, spreading and grows 
l ° the height of about three quarters of an inch. It is 
diehotomously branched; and the branches are linear and 
diverging. The cells are biserial, alternate, and very 
°osely arranged; the apertures are oval, oblique, divergent, 
an d have at their superior and external rim several long 
l nbular spines. These spines, however are much shorter 
tlla U those of C. ciliala, rarely exceeding in length the dia- 
meter of the cell. Tiie number of these appendages varies 
I* 1 different specimens; Ellis has figured it as having only 
; w ° ) a number I have also seen, but they most commonly 
a Uiount to three or four and very rarely indeed to five ; but 
"Aether two, three or four, the same number generally per- 
vades the whole specimen. At the joints, where they come 
1,1 contact with the substance on which the polypidom 
f 1 r ° w s, a few slender tendrils arise, wilh hooks, by which 
le animal is firmly rooted. 
