Number 140 July 9, 1923 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



A NEW NORTH AMERICAN SNAKE OF THE 

 GENUS NATRIN^ 



By Frank N. Blanch ard 



No systematic treatment of the North American species of 

 Natrix akin to the Coluber fasciatiis of Linnaeus has been sat- 

 isfactory, and the present re\newer is under no ilkisions as to 

 the permanence of his present views on the subject. It is 

 time, however, to point out the unity and relatively restricted 

 range of fasciafa and its nearest relatives, and the marked dis- 

 tinction between the southeastern and the ]\Iississippian phases. 

 For the latter there is apparently no name availalile, and it is 

 therefore proposed that it be called : 



Natrix fasciata confluens, new subspecies 



1892 Trnpidonoius obliquus Garman, S., Bull. Essex Inst., vol. 24, 

 p. 6. 



^Contributions from the Department of Zoologj^, University of 

 Michigan. 



