40 
ibis there is a central plaeentral column to which the genin' 1 "^’, 
are attached by an umbilical cord.* The polypes are a ‘ 
in both, and are liable to the same variations and irregular!' 1 
in the number of their tentacula. s 
This species is sometimes abundant under large ston 
between tide marks, in sheltered situations, on sea weed a 
other marine productions, and is more abundant than 1 1 
previously suspected. . . . Sl 
This is said to grow to the height of eight or ten iocj» 
but is more commonly found about one. It is very slig 1 ' 
branched, much resembling the “knotted sea thread/’ h‘ 
which it is not at all times easy to distinguish it; but , 
twisted or ringed foot-stalks to the cells are longer, * 
not placed on enlarged parts of the stem, as in that s P eCl - ( ]e 
“ The cells are deeply cupped, transparent, with a « j 
even margin.” The vesicles are urn-shaped, axillary a 
smooth. 
C AMP ANUL ARIA. 
l.gP 
Generic Character: Polypidom rooted, creeping, or ' v “ , 
compound erect, the main tube filiform, continuous, gP ^ 
off its pedunculated cells irregularly or in whorls; pedic . 
frequently ringed, usually long; cells campanulate; vesic 
scattered', sessile. Polypes hydraform. 
* Stem a single tube. > 
SMALL CLIMBING CORALLINE. C. Volubilis. 
creeping, tortuous, filiform ; cells bell-shaped, with serra ^ 
rims on' long slender ringed foot-stalks ; vesicles irregm a 
ovoid, corrugated. 
Small climbing Coralline, with bell-sliaped cups, 
Coral., p. 24, no. 21, pi. 14, fig. a A. Serb volubilis, L ,, 
and Solander’s Zooph., p. 51, pi. 4, fig. e, f, E. F. 1 or 1 s, 
Lin., vol. 4 p. 680. Stewart’s Elem., vol. 2, p. 444. W , 
-volubilis, Lamouroux’s Cor. Flex., p. 202, no. 340. y\ 0 t 
panularia volubilis, Fleming’s Brit. An., p. 548. Temp 
in Mag. Nab Hist., vol. 9, p. 466. Johnston’s Brit. Lo ° ” 
p. 154, fig. 17. t i,« 
Hub. On the great tooth coralline, on the antennas o 
Corwich crab, on the remains of corallines, and Pinna ion 
Common. Polperro. 
This species is very minute and so escapes common ® L ' c si 
vation, but it is not at all rare on the remains of old coral' j 
and on the antennas of crabs, where it enjoys all the advaP A 
of locomotion in taking its prey. The cells are bell-sb a y' 
sometimes shallow and at others deep, with serrated 
Vide, Introduction to tlie Hydroida, p. 4. 
