694 DR. G. S. BRADY ON ENTOMOSTRACA [June 19, 



ISOPODA. 



Asellus aquaticus Linne. Parantliura nigrofuscata lAicas. 



AMPHIPODA. 



Gammarus pulex De Geer. Paracalliope fluviatilis G. 31. Thomson. 



Paracorophium excavatum G. II. 

 Thomson. 



SCHIZOPODA. 



Tenagomysis novae-zealandias G. M. 

 Thomson. 



MACRURA. 



Xipliocaris cui'virostris Seller. 



BRACHYURA. 



Hymenosoma lacustris Chilton. 



The foregoing list of British species might have been con- 

 siderably enlarged, but of many I do not possess accurate records 

 and have therefore omitted them altogether. The dispropoi'tion, 

 however, between the numbers of British Lake species and of 

 species inhabiting similar places in ISTew Zealand — so far as our 

 present knowledge extends — does not need to be further dwelt 

 upon. The disproportion is not, perhaps, greater than that found 

 among vertebrate animals, both aquatic and terrestrial. To name, 

 for example, only aquatic animals, it may be noted that while 

 New Zealand possesses only one native Amphibian, Great Britain 

 has eight ; and that while the freshv/ater fishes of Great Britain 

 are very numerous, the number of New Zealand species is ex- 

 tremely smalL It is not, therefore, at all surprising to find that 

 the freshwater Crustacea of New Zealand, as at pi'esent known, 

 number only about one-third or one-fourth of the British species, 

 and it seems scarcely likely that further research will materially 

 alter these proportions. But it is noticeable that the great pre- 

 ponderance of British species is confined to the Entomostraca ; 

 while of the higher Crustacea, which are very poorly represented 

 in Great Britain, New Zealand possesses a considerable number. 



The lakes explored by Messrs. Lucas and Hodgkin were 

 Waikare, Tavipo, Rotoiti, Koto Aira, Waikaremoana, Wakatipu, 

 and Manapouri. 



Cladocbra, 



SiMOCEPHALUS GiBBOSUS G. 0. Sars. 



Simocephcchcs gihhosus Sars, On Freshwater Entomostraca from 

 the Neighbourhood of Sydney (1896), p. 15, pi. ii. figs. 4-6. 



Numerous examples of this fine species were found in " nettings 

 from among reeds at a depth of six feet," in Lakes Rotoiti and 

 "VVaikare. 



SiMOCEPHALUS OBTUSATUS (Thomson). 



Daphiia ohtusata Thomson, On New Zealand Entomostraca, 



