CIRROBRANCHIATA. 93 
them, sometimes scaly, spinose or rugose, sometimes smooth. 
Obs. They are found attached to the rocks in all southern cli- 
mate seas; but fossil species are almost unknown. Fig. 227. C. 
Spinosus. 
CHITONEL’LUS. Lam. (From Chiton.) Separated by La- 
marck from Curron, on account of the valves being placed at a 
greater distance from each other. Fig. 228, C. Striatus. 
CHRY’SOLUS. Montf. Potystometia, Bl. A genus of micro- 
scopic Foraminifera. 
CHRY’SOAR. Montf. Probably a species of ORTHOCERAS. 
CHTHA’LAMUS. Ranz. Fam. Balanidea, Bl. Order. Sessile 
Cirripedes, Lam. Descr. Shell much depressed, valves six, thick- 
ened at the base, with prominent areas; operculum nearly hori- 
zontal, composed of four valves. Obs. This description would 
apply generically to the shell called Platylepas in the British 
Museum, only nothing is said about the prominent plates jutting 
from the internal surface of the valves. The difference between 
this genus and Batanus consists principally in the horizontal 
position of the operculum and general flatness of the shell. C. 
Stellatus, fig. 18. 
CIBI'CIDES. Montf. A genus of microscopic Foraminifera. 
CIDAROL’LUS. Montf. A genus of microscopic Foraminifera. 
CIM’BER. Montf. Navicenia, Auct. 
CYNERAS. Leach. (Cimereus, ash-coloured.) Order. Pedun- 
culated Cirripedes, Lam. Descr. A testaceous mollusc, with a 
quadrilateral body, supported on a fleshy pedicle, with an opening 
in front of the upper part, for the protrusion of a bunch of cili- 
ated tentacula. Immediately above this aperture is a pair of 
small elongated valves, placed in a nearly horizontal position ; 
at the lower part is another tripartite pair placed perpendicu- 
larly, one on eachside, and there is a narrow, angulated, keel- 
shaped piece placed at the back. Obs. The nearest approach to 
this genus is Otion. C. Vittatus, fig. 42. 
CIN’'GULA. Flem. Rissoa, Leach. 
CIONEL’LA. Jeffreys. Fam. Colimacea, Bl. Deser. Oblong 
or elongated; last whorl large; apex rather acute, columella, 
sub-interrupted; aperture canaliculated, sub-effuse at the base ; 
margins very unequal; no umbilicus. Bulinus Octonus, Lubri- 
cus, Acicula, &c. Auct. C. Lubrica, fig. 285. 
CIRCE. Schum. Venus Castrensis, fig. 117d. Sulcatina, Ara- 
bica, Pectinata, Auct. And other similar species. 
CIRRI'PEDES. Lam. The tenth class of invertebrated animals, 
so named from the curled and ciliated branchia which protrude 
from the oval aperture of the shells. They are divided into 
SEssILE, i.e. attached by the basal portion of the’shell, and Pepun- 
CULATED, i. e. supported upon a pedicle. Fig. 14 to 43. 
CIRROBRANCHIA’TA. Bl. The first order of Paracephalo- 
phora Hermaphrodita, Bl. containing the genus Dentalium. 
