Number 35. January 27, 1917. 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan. Published by the University. 



TWO NEW LARA^AL TREMATODES FROAI THAM- 



NOPHIS MARCIANA AND THAMNOPHIS 



EQUES. 



By George R. La Rue. 



The specimens forming the basis of this report were secured 

 from specimens of Thamnophis uiarciana (Baird and Girard) 

 and T. eqties (Reuss) taken by ]\Iiss Crystal Thompson and 

 Miss Alyra Sampson, members of the University of Michigan- 

 Newcomb expedition to the Davis ^Mountains in western 

 Texas, during the summer of 1914. They captured four speci- 

 mens of T. niarciana which had distinctly swollen and shorten- 

 ed tails. Even at the time of capture these peculiarities to- 

 gether with the erect position of the ventral and lateral scutes 

 of the tail were noted. At the time of injecting the preserving 

 fluid into these snakes it was noted that some minute white 

 granules or organisms visible to the naked eye burst forth from 

 the lower margins of the swollen scutes and were collected in 



Scientific Papers of the University of Michigan No. 36. 



