Thomson. — On some Crustacea from Macquarie Island. 211 



guelen Island, with S. obtusa in various parts of New Zealand, 

 and I found it among specimens of S. quoyana from Tasmania, 



Order AMPHIFODA. 

 Family Orchestid^e. 



4. Hyale novae-zealandiae. 



Nicea nova-zcalandue, G. M. Thomson, Trans. N.Z. Inst., 



vol. xi., p. 235, pi. 10, figs. Bl, a-f. 

 Nicea neo-zealanica, Thorns, and Chilton, Trans. N.Z. Inst., 



vol. xviii., p. 144. 

 I have not met with this species since describing the 

 original specimens in 1878. These were obtained in the 

 neighbourhood of Dunedin. Mr. Hamilton's collection from 

 Macquarie Island contained four specimens, all females. 



5. Hyale fimbriata. 



Nicea fimbriata, G. M. Thomson, Trans. N.Z. Inst., vol. 

 xi., p. 236, pi. 10, figs. B2, a-e. 



This species, like the last, was originally described in 1878, 

 from specimens found near Dunedin. Numerous specimens 

 occurred in the present collection. The degree of fimbriation 

 of the second antenna?, the character from which the specific 

 name is derived, varies a good deal in different individuals. 



Family Atylid^;. 



6. Atyloides australis, Miers. 



Several specimens of this species occurred in the collection. 

 It has only hitherto been found in Kerguelen Island, but is 

 allied to, if not identical with, .1. megalophthalmus, Haswell, 

 an Australian species. 



Order BEANCHIOPODA. 

 Tribe Cladocera. 



7. Chydorus minutus, G. M. Thomson, Trans. N.Z. Inst., 

 vol. xi., p. 262, pi. 11, fig. E3. 



Numerous specimens of a very small Chydonis, which I 

 think are not specifically distinct from the New Zealand 

 C. minutus, mihi, were found by Mr. Hamilton in a fresh-water 

 pool. They were dark-brownish in colour, probably due to the 

 peaty nature of the soil in which the pools occur. 



The occurrence of the same minute fresh-water species in 

 New Zealand and in such a distant and isolated land as Mac- 

 quarie Island is not very easily capable of explanation. Certain 

 species of gulls, which have no doubt great powers of flight, 

 and which, both in New Zealand and in the Macquarie Island, 

 nest in inland localities, could transport mud on their feet, and 



