REPORT ON THE AMPHIPODA. 1171 



produced on the inner side almost to the apex of the outer ramus, the inner ramus 

 being absent, unless we may suppose that it is in fact coalescent with the peduncle and 

 represented by the produced portion of the peduncle. 



Telson nearly circular, apically a little angled. 



Locality.— Station 49, south of Halifax, Nova Scotia, May 20, 1873 ; lat. 43° 3' N, 

 long. 63° 39' W.; depth, 85 fathoms; bottom, gravel, stones; bottom temperature, 35°. 

 One specimen, female. 



iNCERTvE Sedis. 



Genus Haplocheira, Harwell, 1880. 



1880. Haplocheira, Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 273. 



1880. „ Haswell, Ann. and Mag. Nat Hist., ser. 5, vol. v., January. 



1882. „ Haswell, Catal. Australian Crustacea, p. 269. 



1884. Corophium, Chilton, Trans. New Zealand Inst., vol. xvi. p. 262. 



1885. Haplocheira, Haswell. Proc. Linn. Soc. N.S.W., vol. x. pt. iv. p. 273 (extr. p. 12). 



1886. Corophium (pars), Thomson and Cliilton, Trans. New Zealand Inst., vol. xviii. p. 143. 



For the original definition of the genus, see Note on Haswell, 1880 (p. 512), and for 

 a supplementary account see Note on Haswell, 1885 (p. 565). The type-species had been 

 described by Mr. G. M. Thomson in 1879 as Gammarus barbimanus. It was again 

 described by Mr. Chilton in 1884 as Corophium lendenfeldi. The following definition 

 is offered for comparison with those of neighbouring genera: — 



Mandibles with cutting edge and secondary plate dentate ; spine-row of numerous 

 denticulate spines ; molar tubercle large and prominent ; palp three-jointed, the second 

 joint the longest. 



Ft rst Maxillae with the inner plate rather large, carrying many plumose setse ; nine 

 spines on the outer plate. 



Second Maxillae having a long fringe of setae on the inner side of the inner plate. 



Maxillipeds with the inner plates broad, the outer plates not larger than the inner, 

 the palp elongate, the finger not unguiculate, tipped with a very long spine. 



Antennas subequal ; the upper antennas with a small accessory flagellum. 



First Gnathopods not subchelate, the hand and finger long and slender. 



Second Gnathopods not subchelate, the wrist and hand long and slender. 



First and Second Perseopods with gland-cells in the first and third joints, the finger 

 perforated. 



Fourth Perseopods longer than the Third, Fifth than the Fourth ; the first joint 

 expanded in all three pairs. 



All three pairs of Uropods biramous, the rami in the first two pairs not very unequal ; 

 the third pair with short and stout peduncles, the inner ramus minute, much smaller than 

 the outer. 



