472 Mr. A. O. Walker on the Amphipoda 



Welsh coast. I liiive, however, a specimen, dredged by 

 mjself off Guernsey, which is nearly as large as the type. 



Amphithoe ruhricata (Mont.) and A. littorina (Bate). 

 Xow united under the former name. 



Amphithoe alhomaculata (Kroyer). Not in the collection. 

 This species has also been united with A. ruhricata. 



Amphithoe gammaroides (Bate). Not in the collection. 



Sars has restored Bate's original genus Pleonexes for this 

 species, uniting with it the following. 



Sunamphithoe hamulus {Ba.te)f= Pleonexes gajnmaroides, ? . 



Podocerus pidchellus (Leach). Not in the collection. 



Generally allowed to be the adult male of P. falcatus 

 (Mont.). 



Podocerus variegatus (Leach). Several specimens. 



Among these is more than one form ; some are typical 

 P. falcatus, but tliere are two or three of a form which I 

 incline to think distinct, and which may be considered as 

 being this species. The most obvious distinction is the 

 massive character of the antennge, of which the upper (in 

 adults) have a four-jointed flagellum, the first joint being 

 nearly twice as long as the remaining three together, while 

 in adult P. falcatus the flagellum is seven-jointed, the first 

 joint rather shorter than the following three together. In the 

 thickness of the antennai and in the form of the second 

 gnathopods this species (P. variegatus) approaches Janassa 

 capillata (Rathke), with which Boeck confused it. It may, 

 however, be at once distinguished from that species by its 

 well-developed secondary appendage to the upper antennse 

 and by the outer curved ramus of the third uropods having 

 two secondary teeth, as in P. falcatus, whereas J. capillata 

 has practically no secondary appendage and no teeth on the 

 outer ramus. 



Podocerus capillatus (Rathke). One female with ova. 



Now Janassa capillata. The figure of the entire animal is 

 very bad ; that of the lower antenna is good. 



Podocerus falcatus (Mont.). Three specimens. 

 This is the form considered (no doubt rightly) by Sars as 



