776 



ON THE CH/ETOSO]\[ATID.E, 



muscular walls, and a fairly wide cavity not lined by cuticle 

 (Text-fig.9, rt.o.). Behind the neck-constriction, the oesophagus 

 extends back to the region of the genital organs as a cylindrical 

 tube of uniform diameter, occupying a large part of the space 

 enclosed by the body-walls (Text-fig. 5, ^^.). In an adult female 



Figs. l2-lS.—Gh. faJcatum. 

 Fig. 12. — L.S. through female, in region of ventral setas; ( x 610). 

 Fig. r2a. — L.S. through body-wall between the mesodermal bands, showing 



the subcuticular layer with nuclei (».). 

 Fig. 18. — L.S. through body in region of anterior ovarj' and uterus. At 



the back of the uterus, the section passes through wall of intestine 



only. 



worm, which is 0*055 mm. in cross-section, the diameter of the 

 CESophagus is 0033 mm. The walls are relatively thick, and 

 composed of a single layer of large, rectangular cells, with thin 



