ON THE FAUNA Ot THE LAKES OF CENTRAL TASMANIA. 303 



weeks were spent at the Great Lake, which j^i'oved to contain a very 

 rich and interesting Crustacean fauna. In this lake a new genus and 

 species of the Anaspidacea {Paranaspides lacustris) was discovered in some 

 abundance living in the littoral zone. This species diflers from Anaspides 

 tasmanice in a number of characters correlated with its more active 

 swimming powers ; thus the body is transparent and sharply flexed, and 

 the telson, uropods, and antennary scale greatly enlarged. Living with 

 Paranaspides were three species of Phreatoicus, two of them hitherto 

 undescribed, and a number of Amphipods, including the genus Chiltonia, 

 which shows affinities to the South American llyalella. Besides these 

 a collection was made of the Entomostraca, Flat Worms and Molluscs. 

 During my stay at the Great Lake I added several species to my col- 

 lection of birds, and obtained some specimens of Echidna, Platypus, 

 Basyicrus, and other Marsupials. From the Great Lake I made an expe- 

 dicion across country for about sixty miles, in a spring cart with two 

 horses and a guide, to Lake St. Clair, the westernmost of the lakes and 

 an exceedingly deep one, in places reaching down to ninety fathoms. As 

 the tracts were either non-existent or else exceedingly rough, it took us 

 two days to reach the lake. Dredging and tow-netting was carried on in 

 the lake for two days, and some interesting Entomostraca and a few 

 Worms were obtained, but on the whole the waters of the lake were very 

 lifeless compared to the Great Lake. 



On the way back a ditferent route was taken, and the railway was 

 I'eached at Apsley after three days' driving. One other lake was investi- 

 gated afterwards, namely, Lake Sorell, and a collection made, especially 

 of its Crustacean fauna, which differed considerably from that of the 

 other lakes. 



These collections are now being worked out, but the work has not yet 

 reached a sufficiently advanced stage to report on any general results, 

 though it is evident that the material will throw some light on problems 

 of geographical distribution. 



Besides several smalbr expeditions to freshwater localities in the 

 neighbourhood of Hobart and in the Midlands, I stayed for several days 

 at Bridport, on the north-east coast, to collect specimens of the native 

 freshwater tish, Gadopsis, Aphrltis, &c., and also ttie huge Astacopsis, 

 which in this district attains enormous dimensions. Some of the 

 specimens obtained weighed over 6 lb., and were considerably over a foot 

 in length. 



At the end of February I went on to the west coast, and stayed in 

 some of the mining districts, my object being to see the evergreen beauli 

 forests, which here almost entirely replace the gams, and to study, as 

 far as possible, the fauna and flora and see something of the physical 

 conditions. 



Towards the end of March, I went to Melboui-ne and also to Sydney, 

 and obtained from Professors Spencer and Has well the loan of a large 

 collection of unde.'scribed Australian Crayfishes, aflbrding material for a 

 memoir on this little-known group. 



As a result of the expedition I propose preparing the following for 

 publication ; — • 



1. A book entitled ' A Naturalist's Impressions of Tasmania.' Accepted 

 by the Clarendon Press. 



2. ' Preliminary Account of the Habits and Structure of the 

 Anaspidiidae.' Published 'Proc. Roy. Soc. Lond.,' 1908. 



