CLIIDA. 97 
Disir.—4 sp. Atlantic, Indian, Pacifie Ocean. P. Peronii, 
Lam. (xlii, 27). 
Body fusiform ; head furnished with ocular tentacles ; lingual 
teeth 40-4; mouth covered by a large hood supporting two 
small, simple, and two large acetabuliferous tentacles, suckers 
numerous, pedicillate, neck rather contracted; fins rounded ; 
foot oval, with a pointed posterior lobe; posterior extremity of 
the body truncate, with small branchial processes, and a minute 
rudimentary shell (7). 
In captivity not shy, but swims actively ; when touched folds 
its fins upon its body and falls to the bottom, rolled up into a 
little ball. 
SPONGIOBRANCHAA, d’Orb., 1840. Gills forming a spongy ring 
at the end of the body; tentacles each with six rather large 
suckers. Distr.—l sp. P. australis, d’Orb. (xlii, 28). South 
Atlantic (Fry of Pneumodermon ”). S. elongata, d’Orb., is a Clio. 
PNEUMODERMOPSIS, Bronn, 1862. Branchiz at the extremity 
of the body. P. ciliatum, Gegenbauer. 
TRICHOCYCLUS, Esch., 1825. Head elongated, trunk-like, with 
two lateral tentacles ; two lateral swimming lobes, and an inter- 
mediate lanceolate one; branchiz in a ciliated ring upon the 
middle of the body; two similar ciliated rings, one at the base 
of the head, the other at the truncated posterior extremity of 
the body. P. Dumerilii, Esch. (xlii, 29). Probably larve. 
?) PELAGIA, Quoy and Gaimard. 
, iy 
Htym.—FPelagus, the deep sea. 
Syn.—Pteropelagia, Bronn, 1862. 
Distr.—P. alba, Quoy (xlii, 30‘. Amboina. 
Animal fusiform, truncated in front, rough; head with two 
tentaculiform tubercles; neck slightly contracted; fins small, 
fan-shaped. 
Supposed by Souleyet to be very close to Clio. 
(?) Cymopocea, d’Orbigny, 1840. 
Htym.—Kumodoke, a Nereid. 
Distr.—C. diaphana, V’Orb. (xlii, 32). Atlantic. 
Animal fusiform, truncated in front, pointed behind; neck 
slightly contracted ; fins two on each side, first pair large and 
rounded, lower pair ligulate ; foot elongated ; mouth proboscidi- 
form, four-lobed. The animal is translucent, showing the violet 
viscera. 
CigRirER, Pfeffer, 1879. 
Distr.—C. paradoxus, Pfeffer. Tropical Atlantic. 
Body oblong, head distinct ; superior tentacles small, anterior 
tentacles long, bifid and thickened towards the end. 
