196 



Transac tions . — Zoology . 



herent to the feet of wild ducks in Europe, and found it to 

 contain, or, rather, to give rise to, after proper cultivation, 

 numerous small creatures, such as nematodes, rotifers, eggs of 

 water-fleas, and other small organisms, while other records 

 state that small moUusca have been found adhering to the feet 

 of birds after long periods of flight. 



The lakes that were explored during the survey are 

 Wakatipu and Manapouri in the South Island, and Taupo, 

 Eotoici, Waikare, and Waikaremoana in the North. 



The annelid fauna of the northern set of lakes is quite 

 different from that of the southern couple, not merely in the 

 species, but in the genera ; and, as we should expect, the 

 different lakes in each group are occupied by different species, 

 though there are one or two species common to two or more 

 lakes. Only in the case of one species — viz., Taupodrilus 

 simplex — do I find the same worm occurring both in the 

 northern and southern lakes. 



The richest — i.e., most varied — fauna was obtained from 

 Manapouri, where five species, representing as many genera, 

 belonging to four families, were collected in only six spots. 

 But Taupo is nearly as rich, where five species, belonging to 

 five genera, representing three families, were collected at four 

 stations. 



Table showing Fauna of the Lakes explored. 



Species. 



Number 



of 



Individuals. 



Depths, 

 io 



Feet. 



Number 



of 

 Stations. 



Wakatipu: Maximum depth, 1,242ft.; number of stations at which 

 OligochcEta were obtained, 10 ; total number of individuals ob- 

 tained, 37. 



Plutellus lacustris 



Phreodrilus lacustris 

 Haplotaxis hetcrogyne 

 Limnodrilus, sp. A, inc. 



17 



10 



2 



1 



300-1,200 

 800-1,000 

 550 

 1,000 



7 

 3 

 1 

 1 



Manapouri: Maximum depth, 1,458ft. ; number of stations, 6; total 



number of specimens, 16. 



Phreodrilus lacustris 

 Taupodrilus simplex 

 Limnodrilus, sp. B, inc. 

 Acha^ta maorica 

 Diporochaita aquatica 



G 

 G 

 1 

 1 

 2 



150-500 



10-1,000 

 150-500 



350 

 350-500 



Taupo : Maximum depth, 534 ft. ; number of stations, 4 ; total number 



of specimens, 32. 



.. I 11 150-500 2 



1 150-500 1 



12 300-450 1 



.. 7 ? 1 



..1 ? 1 



Taupodrilus simplex 

 Phreodrilus mauiensis 

 Limnodrilus lucasi 

 Enchytra'US simulans 

 Tubifex, sp. inc. . . 



