substance. They are protected by a multivalve shell,
and have long ciliated curled tentacles, whence their name
(_curl-footed_). The barnacles (_Lepas_) and the acorn-shells
(_Balanus_) are familiar examples.

CIRRO-CUMULUS. This, the _sonder-cloud_, or system of small roundish
clouds in the upper regions of the atmosphere, commonly moves in a
different current of air from that which is blowing at the earth's
surface. It forms the mackerel sky alluded to in the following
distich:--

"A mack'rel sky and mares'-tails
Make lofty ships carry low sails."

CIRRO-STRATUS. Is the stratus of the upper regions of the atmosphere,
heavier looking than the cirrus, but not so heavy as the stratus.

CIRRUS. The elegant modification of elevated clouds, usually termed
mares'-tails (see the distich given at CIRRO-CUMULUS); otherwise the
curl-cloud.

CISCO. A fish of the herring kind, of which thousands of barrels are
annually taken and salted in Lake Ontario.

CISTERN. A reservoir for water placed in different parts of a ship,
where a constant supply may be required. Also furnished with a leaden
pipe, which goes through the ship's side, whereby it is occasionally
filled with sea-water, and which is thence pumped up to wash the decks,
&c.

CITADEL. A fortified work of superior strength, and dominating
everything else, generally separated therefrom by an open space of
glacis or esplanade; often useful against domestic as well as foreign
enemies.

CIVIL BRANCH. That department executed by civilians, as
contradistinguished from the army or navy branch.

CIVILIANS. The surgeon, chaplain, purser or paymaster, assistant
surgeons, secretary, and ship clerks, on board men-of-war.

CIVIL LORD. The lay or junior member of the admiralty board.

CIVIL WAR. That between subjects of the same realm, or between factions
of the same state.

CLAIMANTS. Persons appealing to the jurisdiction of the admiralty court.
They are denominated colourable, or fair, according to the informality,
or justice, of their claims.

CLAKE. A name for the barnacle-goose (_Anser bernicla_). Also, for the
_Lepas anatifera_, a cirriped often found attached to vessels or timber
by a long fleshy peduncle, sometimes 4 or 5 feet in length.

CLAM. A well-known bivalve shell-fish. "As happy as a clam at
high-water," a figurative expression for otiose comfort.

CLAMBER. To climb; to ascend quickly.

CLAMPING. Applying a cross-head, or stirrup-piece, in a s