Hog Lung-Worms 281 
PLATE III. 
Metastrongylus Brevivaginatus. 
iY) 
CLMMUL la 
gd 
TCQWQWQoWht 
CHa 
METASTRONGYLUS BREVIVAGINATUS. 
A. View of male: a, mouth with six lips; b, esophagus; e, intestine; d, e, testicles; 
f, seminal vesicle; g, anterior end of spicule; h, rectum; i, anus; j, spicules; k, bursa; 
1, costae. 
B. Structure of spicule: a, top view; b, cross section; c, side view; d, end view. 
C. M. apri, posterior view of male. Note comparative length of spicules. 
