470 COROPHinXE. 



the typical species, a circumstance which in some 

 measure may be due to the specimen being a female. 

 The first pair of legs are wanting in one specimen. The 

 second are small, having a long, oval, simple hand, and 

 short curved finger. The third and fourth pairs of legs 

 are short, and have the thighs dilated, and the fingers 

 short and curved ; the branchial sac is as long as the 

 incubatory flabellum attached to the same appendage. 

 The fifth pair of legs have the coxa broad, the thigh 

 short, the meta-carpus and wrist short, and posteriorly 

 dilated, considerably broader than long ; the hand ovate, 

 tapering, and the finger short, triple-pointed, and curved. 

 The sixth pair of legs are longer than the fifth, and 

 more simple in character, while the seventh pair are the 

 longest and most simple. The penultimate pair of 

 caudal appendages are the shortest ; the ultimate ter- 

 minating in a double-hooked branch. The middle tail- 

 piece is of a tubercular form, and covered with numerous 

 small sharp teeth or spines. 



Dredged by Mr. Joshua Alder, on the Northumber- 

 land coast. It lives in small cylindrical mud tubes, 

 attached to branches of Antennularia. Its colour 

 appears to be yellow, blotched with patches of white. 



