98 president's address — section d. 



are common to Victoria and in addition to these one more 

 (L. huonensis) is described by Professor Tate as common to 

 South Austraha, while one ( Pomatiopds striahdaj appears 

 to be common to Western Australia. 



Taking the land and freshwater mollusca, the following 

 are the main points of interest which they present : — 



(1.) The large development of these forms, especially 

 aquatic ones, in Tasmania compared with the 

 Colonies on the mainland. This is in keeping 

 with the usual large number of these forms found 

 on islands throughout the world. 

 (2.) The remarkable agreement in generic distribution 



of land forms between Tasmania and Victoria. 

 (3.) The extensive community in species of land forms 

 between Victoria and Tasmania and the slight 

 community between either of these two and the 

 other Colonies. 

 (4.) The striking lack of community in species of 

 aquatic forms between Tasmania and any other 

 Colony on the mainland. 



Pisces. 



In the group Pisces we will again deal only with fresh- 

 water forms. 



In addition to Dr. Giinther's great reference work on 

 fishes we have several excellent lists pubhshed dealing with 

 the fishes of the Australasian region. Prominent amongst 

 these is Sir Wm. Macleay's catalogue, whilst in New 

 Zealand Professor Hutton has published a catalogue of 

 their fishes and, recently, Mr. A. H. S. Lucas has pubhshed 

 a census of Victorian fish and Mr. Johnston a list of Tas- 

 raanian species. 



From the rivers and fresh waters of Australia and 

 Tasmania representatives of 14 families have been recorded, 

 viz., Gadopsidae, Trachinidse, Mugillidse, Siluridae, Haplochi- 

 tonidae, Galaxidae, Osteoglossidae, Percidae, Pristipommatidse, 

 Sparidae, Cyprinidae, Clupeidae, Salmonidae, MuraBuidae, 

 together with genera belonging to the Dipnoi and Cyclos- 

 tomata. 



Two of these — the Osteoglossidae and the Dipnoi — are 

 confined to Queensland, each of these being represented by 

 one species. It is important to note that both groups are 

 confined in their distribution to tropical Austraha, tropical 

 South America and tropical Africa. Osteoglossum leichardti, 



