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A CHECK-LIST OF THE MOLLUSCA 
OF TASMANIA, — 
By W. L. May. 
(Issued. } 
INTRODUCTION. 
{ DESIRE first to express my hearty thanks to the Tasmanian 
Government for their liberality and enterprise*in deciding 
to publish this list, which without their active co-operation 
would in all probability not have appeared in print for a con- | 
siderable period. In 1918 a ‘‘ Check-list of the Marine Mollusca 
of New South Wales,’’ by Charles Hedley, of the Australian 
Museum, was printed and published by the Royal Society of 
that State; and my work will be on exactly similar lines, 
forming with it the nucleus of a series which it is hoped may 
be extended until each of our States has such a list, the 
whole forming, when complete, a uniform census and classifi- 
cation for the whole Commonwealth. It is now twenty years 
since the last Tasmanian list appeared, being ‘“‘ A Revised 
Census of the Marine Mollusca of Tasmania,’’ by Professor 
Ralph Tate and W. L. May, published by the Linn. Soc. 
of New South Wales in 1901. This was a great advance’ on 
any previous work, and is still valuable for reference; in the 
introduction will be found a useful sketch of the history- of 
marine conchology in Tasmania, which it seems not necessary 
to repeat. Since the publication of Tate and May’s work a 
large amount of investigation, both in Tasmania and abroad, 
in literary study and field work has taken place, the result 
being many changes in nomenclature, due largely to the 
operation of the law of priority in names; and also the addi- 
tion of very many new species, the latter having been prin- 
cipally added by deep-sea dredgings on our east coast, where 
