CLTID^. 9t 



Distr. — 4 sp. Atlantic, Indian, Pacific Ocean. P. Peronii, 

 Lam. (xlii, 21). 



Body fusiform ; head furnislied with ocular tentacles ; lingual 

 teeth 4-0*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 

 rudimentar}^ shell ('r'). 



In captivitj^ not shy, but swims actively ; when touched folds 

 its fins upon its body and falls to the bottom, rolled up into a 

 little ball. 



SPONGIOBRANCH^A, d'Orb., 1840. Gills forming a spongy ring 

 at the end of the body ; tentacles each with six rather large 

 suckers. Distr. — 1 sp. P. australis^ d'Orb. (xlii, 28). South 

 Atlantic (Fry of Pneumodermon ?). S. elongata, d'Orb., is a Clio. 



PNEUMODERMOPSis, Bronn, 1862.' Branchiae at the extremitj^ 

 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 ; branchiae 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. Duvierilii, Esch. (xlii, 29). Probabl}^ larv*. 



(?) Pelagia, Qvioy and Gaimard. 



Etym. — Pelagiis, 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. 



(?) Cymodocea, d'Orbigny, 1840. 



Etym. — Kiiviodolce, a Nereid. 



Distr. — G. diaphana, d'Orb. (xlii, 32). Atlantic. 



Animal fusiform, truncated in front, pointed behind ; neck 

 slightly conti'acted ; 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. 



CiRRiFER, Pfeffer, 18Y9. 



Distr. — C. paradoxus, Pfeffer. Tropical Atlantic. 



Body oblong, head distinct ; superior tentacles small, anterior 

 tentacles long, bifid and thickened towards the end. 



