288 
BRITISH ENTOMOSTRACA. 
branches. The first three pairs are each composed of two 
joints, all of which are armed at their extremities with a 
series of short sharp hooks. The last pair has only one 
joint to each branch, and the outer branch alone has the 
hooks. These hooks are evidently useful to the animal in 
moving or walking, by enabling it to attach itself to the 
bodies upon which it creeps. The oviferous tubes take 
their origin from the last thoracic segment, though at first 
sight they appear to spring from the last abdominal ring. 
1. Pandarus bicolor. Tab. XXXIII, fig. 'TO, 0 
Pandarus bicolor, Leach , Encyc. Brit. Supp., i, 405, t. 20, f. 1, 2 ; 
Diet, des Sc. Nat., xiv, 535. 
— Desmarest , Cons. gen. Crust., 339. t. 5, f. 5. 
— M. Edwards , Hist. Nat. Crust., iii, 470. 
— Burmeister , Nov. Act. Acad. Nat. Cur., xviii, 331. 
— Kroyery Tidsskrift, ii, t. 1, f. 6 (?). 
Caligus bicolor, Lamarck , An. s. Vert., edit. 2d, v, 210. 
Description . — The body is much elongated and oval. 
Frontal plates large, and separated from each other by a 
deep notch. Hinder edge of the carapace almost smooth. 
Elytraform appendage of the second thoracic segment 
scarcely extending beyond the appendages of the first 
ring ; that of the third segment is narrowed towards the 
extremity. The last thoracic segment is of a somewhat 
oval form, and surrounded by a small pale border. The 
last abdominal ring is somewhat rounded,, and the lateral 
caudal appendages are short and obtuse. The cephalo- 
thoracic segment and the second and third thoracic elytra- 
form appendages are marked in the centre with patches of 
black. 
Hab . — Taken from the Squalus galeus , Linn., at Tor- 
cross, Devonshire; Dr. Leach. British Museum. From 
the Carcharius glaucus , captured a few miles from the har- 
bour of Falmouth, 1849 ; W. P. Cocks, Esq. 
