CIRRIPE1M. 
471 
by a tubular, scaly peduncle; multivalve, but the valves never 
exceeding thirteen in number, which are concentrically striated, 
and frequently with a central pointed inclined knob. 
Scalpeltum vulgare. — The Common Scalpellum. 
Plate XCII. fig. 4. 
Valves rough, the dorsal one compressed ; covered with short 
hairs; peduncles short, annulated, and hairy. Inhabits the 
British seas. 
Genus 5.—.A NAT IF A.— Bruguiere. 
Generic Character. —Body covered with a shell, supported by 
a tubular tendinous peduncle ; with long, numerous, and unequal 
tentacular arms, which are articulated and ciliated, and emanat¬ 
ing from the summit on one side. — Shell compressed on the 
sides, with five contiguous and unequal valves ; the lower lateral 
ones the largest. 
Anatifa leevis —The Smooth Anatifa. 
Plate XCII. fig. 5. 
With five smooth valves; the dorsal valve rounded at the 
sides, and slightly carinated; peduncle very long, of a scarlet 
colour. Inhabits the British seas. 
ORDER II.—SESSILIA. 
Body without a peduncle, and inclosed in a multivalve shell, 
seated immediately on marine bodies, or rocks; mouth and ten- 
tacula placed in the apex, or upper part of the body. 
* With a bivalve operculum. 
Genus 1.—PYRGOMA.— Savigney. 
Generic Character. — Seated univalve, globularly ventricose, 
convex above, and open at the apex; opening small, elliptical, 
provided with a bivalve operculum. 
Pyrgoma crenata. — The Crenated Pyrgoma. 
Plate XCII. fig.6. 
With radiated ribs, and crenated round the margins ; of a pale 
violet colour. 
2 q 2 
