1766 LIST OF THE AUSTRALIAN PALiEICIITHYES, 
are well known tropical forms ; and the remaining two are 
those previously mentioned as doubtful, namely, G. tricuspidatus 
of whose specific value I confess myself sceptical, and Lamna 
cornubica of whose correct identification I am equally sceptical. 
With respect to the synonymy the following changes are pro- 
posed, and the reasons for each plainly set forth under their 
individual headings — Sphyrna for Zyycma, Isurus for Lanina^ and 
Cetorhinus for Selache. 
So few Australians take any scientific interest in the distribution 
of our fishes, that it is almost impossible to gain definite informa- 
tion on that point, absolutely none of an authentic character 
being attainable except at the main centres of research, such as 
Sydney, Melbourne, Adelaide, Brisbane, and Hobart, while the 
vast sea-board of West Australia, with its rich and varied endow- 
ment of marine fauna, is so far as we are concerned almost a 
terra incognita. It will therefore be easily understood that the 
difficulties, which have to be surmounted by naturalists in the 
attempt to define with any degree of accuracy the limits of the 
distribution of our species, especially the marine species, are almost 
insurmountable ; and this must be taken as an excuse for the 
meagreness of the information which I am able to give, since I 
have only included localities from whence there is an authentic 
record ; in order to make this paper more interesting I have 
included the south coast of New Guinea in the list of localities. 
The species to which an asterisk is prefixed are now for the 
first time included in our fauna. 
CARCHARIID^. 
Carcharias, Rafinesque (1810). 
*1. C. ACUTUS, Riipp. Burnett R., Q. ( Austr. Mus.). This 
example, which is but twelve inches in length, agrees in 
every point, excepting that mentioned in the paragraph on 
the succeeding species, with Ruppell’s fish, and with a 
Madras specimen from the collection of Mr. Francis Day. 
