226 HISTORY OF BRITISH CRUSTACEA. 



them (the Apseudida) have the first pair of legs ending in 

 a two-clawed hand, while in the others {Limnoriadat) the 

 first pair of legs resembles the others. 



Gen. 110. APSEUDES, Leach. 



Body elongated, depressed, nearly of same breadth through- 

 out. First pair of antennae short, slender, with many- jointed 

 thread at end; second pair outside the first, thick and 

 rather long ; peduncle of four joints, succeeded by a many- 

 jointed thread ; the first pair of legs short, with a large 

 swollen hand ; second pair wide, flattened, spiny, and appa- 

 rently adapted for digging ; the five last pair slender. Ab- 

 domen ending in two long threads. 



Apseudes talpa, Montagu, sp. Mole Hog-louse. — Yel- 

 lowish-white. Head pointed. First five segments of ab- 

 domen very hairy on the sides, the last as large as all the 

 others taken together. 



Coast of Devon (Salcombe) . It was first observed there 

 by Colonel Montagu, who remarked that the two long 

 caudal setae are capable of closing together instantaneously. 

 It is about four lines long. 



