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PREFERENCE LIST OF THE LAND AND FRESH- 

 WATER MOLLUSC A OF NEW ZEALAND. 



By C. Hedley and H. Suter. 



Many catalogues of the terrestrial and fluviatile MoUuscan 

 fauna of New Zealand have appeared. The earliest, in 1843, 

 was a list of 15 species included in Gray's New Zealand Fauna, 

 an appendix to Dieffenbach's "New Zealand"; this was translated 

 into French in Vol. vii. of the Revue Zoologique. In the P.Z.S. 

 1849, pp. 164-169, the same author added 14 more species. The 

 next with which we are acquainted is a list, collected from Pfeiffer's 

 Monographs, of 73 land shells in Dr. Cox's "Exchange List," dated 

 1868. This was followed in 1873 by two catalogues published by 

 the Colonial Museum, Wellington; the one containing descriptions 

 of the known land shells compiled by Mr. A. W. Scott and Dr. 

 Cox, the other a most excellent critical and synonymic survey of 

 all the species by Dr. von Martens. This preliminary work 

 enabled Prof. Hutton to issue, in 1880, the fuller account of this 

 section contained in his "Manual of the New Zealand Mollusca." 

 The latter author instituted in 1883 "A Revision of the Land 

 Mollusca of New Zealand" (Trans. N.Z. Inst. xvi. pp. 186-212), 



* The basis of this paper was an article entitled — " Synonymic and 

 Bibliographical Catalogue of the New Zealand Land and Freshwater 

 Mollusca," by H. Suter, communicated by myself to the December Meeting 

 of 1892 and summarised in the monthly Abstract. The exigencies of space 

 required that this article should be curtailed, selected being substituted for 

 complete bibliographical references, &c., &c. ; renewed literary search and 

 study also enabled me to amend Mr. Suter's work in various particulars. 

 Finally, having thus re-cast the original memoir and altered the title to suit 

 the circumstances, my name is, at Mr. Suter's request, joined with his as 

 responsible for the following contribution. — C. Hedley, Feb. 20, 1893. 



