president's address. 
665 
Viewing the results in their relation to geographical distribution 
some important considerations present themselves. The range of 
many known species is* now for the first time considerably 
extended. Examples are the Echidna, Srnin'Jbopsis murinn and 
S. crassicaudata, Antechinomys, five out of the six frogs, some of 
the birds and reptiles ; among invertebrates the crayfish 
(Astacopsis), the freshwater crab (Felphusa), Apus, and others of 
the Entomostraca; and certain molluscs and insects. 
Taking the different orders separately, some curious relations 
manifest themselves. Among the mammals along with character- 
istic and ubiquitous forms there occur also species found likewise in 
the inland portions of one or more of each of the mainland 
colonies. The birds, with the exception of five new species, Mr. 
North reports to be chiefly species ranging over the southern half 
of the continent, with a slight preponderance of western forms 
a slight admixture of north-western species, and an absence of 
northern species. Among the lizards, together with Eremian 
and widely dispersed species, there are northern and western forms. 
Of the frogs, one species is new: the remaining five occur also in 
the interior of New South Wales or Queensland only one of them 
(Hijla rubella) extending also to West Australia. The land 
Mollusca, of all the Orders represented, present the largest per- 
centage of endemic forms; their general f acies approximating more 
to that of subtropical West Australia than to any other part of 
the Continent. From the limited number of genera and their 
peculiar distribution Prof. Tate regards them as indicating a 
primitive group whose insularity has long been maintained. The 
fluviatile Mollusca, however, present species belonging for the 
most part to Queensland and the Northern Territory. 
Considering the fauna of Central Australia as a whole, it 
will be seen that the regions into which Prof. Tate has proposed 
to subdivide Australia from botanical considerations are not 
equally satisfactory from a zoological point of view. Probably 
no one set of regional subdivisions would entirely suit the views 
of all specialists. 
