A Morphological Study of Strongylus douglasi, Cohhold. 267 
which in its terminal portion crosses the mass of cephalic glands and the 
muscular layer with a thick cuticular membrane, and then ends pointing 
obliquely upwards with a medio-ventrally placed excretory pore at about 
90 ^ under the lower margin of the nervous commissure (Figs. 3, 4 ex. p.). 
Fig. 9. — Posterior end of a female. Magnification : 
350 diameters. 
The cervical glands extend backwards for about a quarter of the 
length of the body and possess a fusiform swelling in the posterior half. 
Gejierative System. — In the male one single genital duct is discernible, 
