AMPHIPODA. 



posteriorly straight, anteriorly convex, and furnished with 

 two rows (one on the edge and the other a little within it) 

 of very long slender seise, arranged in comb-like manner; 

 ischium and meros narrower than carpus; carpus narrow, 

 only slightly widening distally ; propodos tapering from 

 base to distal extremity, both margins fringed with long- 

 setae, those of the anterior side the longer ; finger very 

 long, of equal thickness throughout, more than half as long 

 as propodos, not unguiculate nor capable of being bent 

 back upon the propodos ; the blunt distal extremity 

 terminated by two or three setse." 



Mr. Walker and M. Chevreux are of opinion that this 

 is the L. pilosus of Zaddach. Future observation must 

 finally determine the point. The specimen examined by 

 Zaddach was very small, only about 3 mm. If the 

 specimen was the young of L. hirsutimanus, as Sars takes 

 it to have been, the massive development of the uropods 

 would not have been assumed, and this would account for 

 that character not having been noticed by the author. A 

 question of distribution also comes in : we know that 

 L. hirsutimanus occurs in the Baltic, but L. pectinatus has 

 not as yet been found north of the British Isles. 



Length 2'5 mm. 



[LEPTOCHEIRUS FASCIATUS (A. Costa). (PL V. figs. 11, 

 12.) 



1864. Protomedeia fasciata, A. Costa, " Di due nuove specie di 

 Crostacei Amfipodi del Golfo di Napoli," Ann. del Mus. Zool. 

 della R. Univers. di Napoli, Anno ii. p. 155, pi. ii. fig. 8 (fide 

 Chevreux). 



1893. Leptocheirus pilosus, Della Valle, p. 427, pi. xii. figs. 1-14. 



1899. Leptocheirus Dellavallei, Stebbiug, Ann. & Mag. Nat. Hist, 

 ser. 7, vol. iii. p. 350. 



1900. Leptocheirus fasciatus, Crevreux, Kesultats Campag. sci. 

 Prince de Monaco, Fasc. xvi. Amphip. de ' I'Hiroudelle,' p. 91 

 (note). 



The Mediterranean species is not known to the British 

 fauna, but approaches so nearly to L. pectinatus that it may 

 be useful to call attention to the points of difference. We 

 are indebted to Prof. Della Valle and M. Chevreux for 

 specimens, and we figure the first gnathopod. On the 

 authority of the latter it is here called Leptocheirus 

 fasciatus (A. Costa). 



The first gnathopod has the coxa (fig. 11 a) produced 

 to a point ; the hand is fully three times as long as broad, 

 the palm at the extremity of the joint is boldly convex and 

 microscopically serrulated (fig. 12); the finger far exceeds 



