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The Amphibians and Reptiles Collected 



by the University of Michigan- Walker Expedition in 



Southern Vera Cruz, Mexico. 



By 



Prof. Alexander G. Ruthven, 



Head Curator, University of Michigan Museum of Natural History. 

 With Plates 6-11. 



In Deceraber, 1910, it was announced to tlie Board of Regents 

 of the University of Michigan that Mr. Bkyant Walkee, Detroit, 

 Michigan, proposed to give to the Museum the funds necessary to 

 Cover one half of the expenses of a zoological expedition to southern 

 Vera Cruz, Mexico, if the University would bear the rest of the 

 expense. The conditions of the gift were met by the Board of 

 Regents with a special appropriatiou, and the work of organizing 

 and conducting the expedition was given to the writer as Head 

 Curator of the Museum. 



It was thought best for several reasons to conflne the work to 

 a few groups, so the writer elected to limit the party to two men, 

 and the groups to receive particular attention to the molluscs. 

 amphibians and reptiles. Mr. H. B. Bakee, assistant in the zoo- 

 logical department of the university, was engaged to collect molluscs, 

 and the writer gave his primary attention to amphibians and 

 reptiles. No opportunity was lost, however, to collect other forms 

 when this did not interfere with the work on the above mentioned 

 groups, so that a considerable amount of miscellaneous material was 



Zool. Jabrb. XXXII. Abt. f. Syst. 21 



