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. 10. 



Pandarus bicolok, Leach, Eucyc. 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 . 



— Kroi/er, 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 Sqiialus 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. 



