74 



and temperate regions. Of a total of 461 species, only two are- 

 extra-au st ralian. 



The tropical characteristics of the land snails of N.E. Queens- 

 land are indicated by tlie presence of the genera Realia, Pupijia, 

 Callia, Cyclophorus, Diphinmatina, Leptopoma, Jlelicina, Georissa, 

 TornateJIina, Sfenogyra, Stenojnis, Vaginuhis, and the geotrochoid 

 Helices ; of these Pujniia, Helicina, /^te7iopus, and the section 

 Geotrochus of lleJix extend in a few representatives into more 

 southern latitudes. 



The Australasian types (embracing S. Polynesia and New- 

 Zealand), which occur chiefly in our extratropical regions, are 

 AtJioracophorus, Paryphanta, Rhytida and Dij^Ioinphcdas, and 

 Cysfopelfa, whicli is peculiar. 



The Fluviatile Mollusca are also with few excejDtions endemic 

 and of genera of world-wide distribution ; it is only in MeJania 

 (1 sp.) and KeHtina ip s>^.) that extra-australian species occur. 

 Their esoteric distribution has not yet been fully worked out, and 

 though some species are widely dispersed over the eastern half of 

 the continent, yet the majority are so far only known to occur 

 each in its own hydrographic area. 



The genera Amnicola (if correctly identified) and Gundlachia 

 are American ; Physopsis in another species is South African ; 

 Mycetopus and Larino. are tropical ; whilst Tcttea is peculiar. 



Summary of the Teerestrial and Fluviatile Mollusca. 



