CRUSTACEA. 321 



and shorter segments of the body and peduncular joints of the 

 superior antenna), relatively longer inferior antenna?, &c, as a com- 

 parison of the figures will show ; but as Mayer refers to this species 

 (founded upon types from ltio do Janeiro) specimens sent to him by 

 Mr. Haswell from Port Jackson, and our specimen agrees with Dana's 

 figures of tho male in the denticulation of the palms of the second 

 Legs and in other characteristic points, I do not venture to regard it 

 as distinct. 



Caprella novce-zealandun of Kirk * comes very near this species, 

 but differs in the form of the non-ciliated joints of the flagellum of 

 the superior antenna), and the penultimate joint of the second legs is 

 armed (apparently) with but two teeth. Both C. novce-zealandim 

 and Protclla australis, which greatly resemble this species, have a 

 spine or tooth on the penultimate joint of the three posterior legs, of 

 which scarcely any indications exist in the specimens I refer to 

 C. attenuata. 



Two other very small Oaprdlce, also obtained at Port Jackson, 

 are in the collection, which I am unable to identify with certainty, 

 but do not think it desirable to designate by a distinct specific 

 name. 



OSTRACODA. 



The few Ostracoda collected were submitted to Dr. G. S. Brady 

 for determination, who referred them to the following species : — 



1. Cypridina albo-maculata, Baird. 



The specimens collected were from Port Darwin, 12 fms., and 

 Dundas Straits, 17 fms. (No. 161). The original types were from 

 Western Australia, Swan Paver. 



CIRRIPEDIA. 



1. Balanus trigonus, Darwin. 



Numerous specimens (mostly small) were obtained at Port Jack- 

 son, 0-5 fms. (No. 90). Darwin records it from Sydney, and 

 mentions its distribution through the Malaysian seas and its oc- 

 currence at New Zealand and also on the W. coast of the American 

 continent. 



2. Balanus amaryllis, Darwin. 



A specimen from the beach at Port Darwin (No. 176), and 

 several small specimens from Albany Island, 3-4 fms., attached 

 to a shell, appear to belong to this species. In the, two largest 

 specimens, however, whose opercula I have examined, the scuta 



* Trans. New-Zeal. Inst. xii. p. 393 (1879). 



