AMPIIirOUA AND ISOPODA OF THE FIRTH OF CLYDE. 201 



clearly distinguish the species from Socarnes Vahlii, 

 which in many respects it closely resembles. 



This species has also been taken on the French 

 Coast by Monsieur Jules Bonnier, who courteously 

 refrained from publishing it, on learning that the 

 description was already written for the present 

 catalogue. , 



P A K A R I s T I A s, new genus. 



This agrees in general with A7-istias, Boeck, as re- 

 defined by Sars, but differs in the following points. 

 The second antennje have, at least in the female, a 

 very short flagellum abruptly narrower than the 

 peduncle. The first maxillse have only three stout 

 feathered setae on the inner plate. The plates of 

 the second maxillae are not divergent. In the maxil- 

 lipeds the palp scarcely projects beyond the large 

 outer iDlate, and is quite devoid of the terminal 

 unguiform joint, any division between the three 

 preceding joints being almost imperceptible. The 

 third pair of uropods do not reach at all beyond 

 the preceding pair. The telsou ends in a broad but 

 shallow emargination. 



Pa)'aristias audouinianus is probably the same as 

 the Lyslanassa Audouiniana of Spence Bate, Avith 

 the description of which it agrees very closely, 

 except in regard to the telson, which Bate speaks 

 of as " rounded at the apex." The jjresent species 

 has been described and well figured by Heller iinder 

 the name of An'stias (Kroyer) juv. He figures the 

 telson, hoAvever, as very much narrowed and rounded 

 at the end, without either cleft or emargination. 

 His specimen was an eighth of an inch long, and 

 this condition of the telson may appertain to an 

 early age. He also states that the maxillipeds are 

 entirely devoid of inner plates, but this is no doubt 

 due to his having overlooked them. They are very 

 small, and are apically surmounted with two or 

 three rather spine-like setae. The species differs not 

 only by the generic characters, but in a number of 



