BY VERA A. IRWIX-SMITH. 



779 



bably function as digestive glaiids(Text-fig. 9, (/.c), and in addition, 

 there are several granular masses of a yellow colour embedded 

 in the hvpodermal tissue immediately surrounding the mouth, 

 which may be glandular. Possibly the pink-stained bodies and 

 the vacuoles in the wall of the stomach have a glandular func- 

 tion. In addition, there is a large, granular mass of tissue, 

 staining deeply blue with hsematoxylin, situated immediately 

 above the rectum (Text-figs.3, 17-19, ^.^.)- It occupies most of 

 the space between the dorsal wall and the rectum, and extends 

 as a longitudinal strand into the tail-region, opening by a duct 

 at the extremity of the tail. This may correspond to the tail- 

 gland described in many marine Nematodes, and thought to be 

 excretory in function. 



dm.b 



Fig. 2 1 • 



rigs.20-21.— CA. falcatum. 

 Fig. 20. — T.S. through bodj^ of female at beginning of anterior ovary; 



( X 450). 

 Fig. 21. — Very oblique section through region of female genital aperture, 

 showing portion of anterior ovary and uterus. 

 There is no trace of the longitudinal lateral vessels found in 

 Nematodes, and the only indication of a nervous system is in 

 tlie shape of an ill-defined granular mass of tissue round the 

 constriction between the two pharyngeal bulbs. 



