SOME NEW ENJDOPARASITES OF THE SNAKE. 
THESLE T. JOB. 
In the fall of 1916 a large, live specimen of Black Snake, 
Zamenis constrictor (Linn.), was sent from Garrison-on-Hudson, 
New, York, to Miss G. Van Wagenen of the State University of 
Iowa. In December the snake was killed and dissected. At 
that time three different endoparasites were found which were 
classified according to the present inadequate and chaotic liter- 
ature on these groups, as Porocephalus globicephalus Hett, a new 
Benifer and a larval Gigantorhynchus. 
It is not the purpose of this paper to add new names to the al- 
ready complicated list, but rather to record the characters of 
the male P. globicephalus Hett, which Mary Hett did not have 
in describing the species, and to give additional notes on the 
habits and anatomy; also to .record the data of what is appar- 
ently a new species of Benifer. 
Porocephalus globicephalus Hett. 
This is a Linguatulid worm. Mary L. Hett of the London 
Zoological Society described and named the species from a single, 
mature female specimen, procured from the lung of an American 
specimen of “moccasin,” Tropidonotus fasciatus (Linn.). In 
the Proceedings of the Zoological Society of London, 1915, pages 
115-121, she gives the following characters: length 50 mm.; an- 
nulations about 50 ; hooks simple and sharply curved ; mouth is 
pear-shaped with pointed anterior end; head globular; well 
marked reck; anus transverse slit on terminal segment. 
There were five males and five females found in the host re- 
ported here. One female was taken from the middle portion of 
the lung and two other females from the posterior end of the 
lung, while three males were taken from the same general region. 
Another male and female were taken from the dorsal body wall 
of the air sac about one foot posterior to the lung, and still an- 
other pair a foot further back, also from the dorsal body wall of 
the air sac. 
The females were found with only the head embedded in the 
lung tissue, or, those in the air sac, in the musculature of the 
body,, where a copious hemorrhage was found. The rest of the 
