188 COLLECTIONS FROM MELANESIA. 



Caprella cequilihra (Say). E. Australia (Port Jackson) ; New Zealand ; 

 Hong Koiifr; Mediterranean; Norway; Britain; E. coast of 

 Uniliil States; Brazil. 

 * attenuata, Dana? E. Australia (Port Jackson) ; Bio de Janeiro. 



Ostracoda. 



Oypridina albo-maculata, Baird. N. Australia (Port Darwin, Dundas 

 Straits) ; W. Australia (Swan River). 



CIEEIPEDIA. 



Balanus trigonus, Darwin. E. Australia (Port Jackson and Sydney) ; 



New Zealand; Malaysian seas; W. coast of America; Peru; 



Columbia; California. 

 amaryllis, Darwin. N. to E. Australia (Port Darwin to Moreton 



Bay) ; Philippines ; Malaysian archipelago ; mouth of the Indus. 

 Acasta sulcata, Lam. (var. P). N. to E. Australia (Albany Island to 



Moreton Bay) ; S. Australia ; W. Australia (Lamarck). 



PYCXOGONIDA. 



Achelia Icevis, Hodge, var. australiensis, n. E. Australia (Port Jackson). 

 PhoxichUidium hoekii, sp. n. N. Australia (Dundas Straits, Thursday 

 Island, Prince of Wales Channel). 



DECAPODA. 



BBACHYUEA. 



1. Achseus lacertosus, Stimpson. 



Here is somewhat doubtfully referred a small male specimen from 

 Port Jackson (0-5 fms.), which differs from Stimpsoirs diagnosis 

 only in the somewhat slenderer merus-joint of the chelipedes, which 

 resembles that of A. breviceps, Haswell (a species which Mr. Haswell 

 in his latest work regards as synonymous with A. lacertosus), in being 

 of a somewhat trigonous form ; the palm or penultimate joint is 

 thin-edged along its upper margin, but scarcely carinated. 



The specimen I refer to A. lacertosus also bears some resemblance 

 to the European A. cranchii in the absence of a neck-like constriction 

 behind the orbits, and in the comparatively short ambulatory legs, the 

 dactyli of the last three pairs being rather strongly falciform. In A. 

 cranchii, however, the eye-peduncles have a tubercle on their anterior 

 margin, the distal end of the merus of the outer maxillipedes is more 

 distinctly truncated, and the ambulatory legs are even shorter. 



In the second collection received from Dr. Coppinger are two 

 females from Dundas Strait, North Australia (No. 161), which 

 scarcely differ, except in the somewhat broader carapace. 



2. Achseus affinis. 



Carapace subtriangular and moderately convex, with the surface 

 uneven, but the regions not very distinctly defined ; the postorbital 

 region is constricted. The rostrum is moderately prominent, the 



