CETOCHILUS. 
233 
Family 3— CETOCHILIDA3 * 
Pontiens, M. Edwards, Hist. Nat. Crust., iii, 412. 
Pontiadae, Baird, Trans. Berw. Nat. Club, ii, 155. 
Character . — Head distinguishable from body, but firmly 
articulated with the first ring of thorax. Foot-jaws three 
pairs, strongly developed. Legs five pairs. Eyes two 
in number. Right antennae alone, in male, furnished 
with the swollen hinge-joint. 
The individuals hitherto discovered belonging to this 
family are not numerous. The only British genus yet 
noticed is the genus Cetochilus. 
Genus Cetochilus. f 
Roussel de Vauzeme , Ann. des Sc. Nat., 2d series, i, 333. 
M. Edwards, Hist. Nat. Crust., iii, 421. 
Goodsir, Edin. New Phil. Journ., xxxv, 339. 
Baird, Trans. Berw. Nat. Club, ii, 156. 
Character . — Head furnished with two small, styliform 
prolongations. Antennules of two branches, of nearly 
equal size. Foot-jaws not branched. Thorax of six, 
abdomen of four segments. Last pair of feet of the same 
formation as the others. 
This genus was established by Roussel de Vauzeme, 
in the ‘ Ann. des Sc. Nat./ second series, i, 1834 ; and he 
there gives a very interesting account of its use, as con- 
stituting, in a great measure, the food of the whale. 
Vauzeme was attached to a vessel employed in the whale 
fishery in the Southern Ocean ; and for four months the 
crew were engaged in the neighbourhood of the island of 
* The term Pontia having been preoccupied by a genus of Lepidoptera, 
it may become necessary to alter the name of M. Edwards’s genus of this 
family. Mr. Dana, indeed, has done so, changing it to Pontella. I have 
therefore used the term Cetochilida as not liable to any objection, and the 
more especially as the genus Cetochilus is the only one of the family found 
in Britain as yet. 
f From ktjtoq , a whale ; and xiXoe, food. 
