71 



have no guide for delimitation. However, in my list all West 

 Australian species from north of Swan River have been entered 

 as belonofinoj to the Indo- Australian Province. 



The Australian province has yielded 1,672 species, of which 

 1,274, or 76 per cent., are restricted. Of the 399 extra-limital 

 species, 57 are migrants to or from IS^ew Zealand, which is an 

 outlier of the larger Australian province, whilst not a few others 

 extend to the South Polynesian area, which has also received 

 species from the Indo-Australian Province. Thirteen other 

 components of this fauna link temperate Australia and South 

 Africa. The only cosmopolitan species are Saxicava mxtica, 

 Teredo nivalis, Lascea rubra, and Ostrea edulis (if 0. Angasi be 

 not distinct). Thus by these eliminations the actual number of 

 Oriental species is reduced to 300, or about 18 per cent, of 

 the whole. 



The Indo-Australian Province has yielded 1,495 species, of 

 which 676, or 45*2 per cent., are endemic in Australia, so that 

 more than half the species are migrants from the Oriental 

 Province. 



The percentage of endemic species for the whole of Australia is 

 64, and for each class as follows : — Cephalopoda, 75*6; Gastropoda, 

 63-8; Scaphopoda, 28*5; Pteropoda, 0; Conchifera, 65-6; 

 Palliobranchiata, 53. 



The following table summarises the distribution of the marine 

 species in each class or large group : — 



