IQI4-] F. H. vStewart : Indian Helminthology, No. I. 171 



In cross section the lateral membrane has the form of an 

 equilateral triangle. 



The cuticle is entirely plain and unringed. 



The lateral lines measure "0238 mm. in breadth in theoesopha 

 geal region. Lateral canals are not visible. 



Female.— The tail of the female (fig. 20) is sharply conical, 

 the anus is situated "25 mm. from the tip. The body cavity of 

 the tail is occupied by a glandular mass. The vulva is situated 

 at the junction of the middle and posterior thirds of the body. 

 It is a transverse slit extending through one-third of the circum- 

 ference of the body. The internal reproductive organs of the 

 female will be described in a later paper. 



Male. — The tail of the male when viewed in profile is seen to 

 be arched on the dorsum and flattened on the ventral surface by 

 the formation of the bursa (figs. 21 and 22, 33 and 34). It is 

 terminated by a sharp narrow caudal appendage -073 mm. in 

 length. The region of the tail which carries the bursa measures 

 ■44 mm. in length, both the transverse and sagittal diameters are 

 enlarged compared with that portion of the body which imme- 

 diately precedes it. The bursa is formed by two flatly semicylin- 

 drical cushions applied lengthwise to the body between the mid- 

 ventral and lateral lines (figs. 33, 34). The anterior boundary is 

 marked by the sucker (fig. 22), the posterior by the base of the 

 caudal appendage (fig. 21). 



Five rows of papillae occur on the surface of the bursa — two 

 sublateral and two sub ventral on the cushions, and one median 

 ventral in the space between the cushions. The sublateral series 

 consists of three papillae with finger-like pulpae: (i) (numbered 

 from behind forward) situated dorsal to the posterior end of 

 number i subventral papilla; (ii) dorsal to the anterior end of 

 number 2 subventral; (iii) dorsal to the interval between numbers 

 2 and 3 subventral. 



The subventral series consists of eight papillae — numbered 

 again from behind forward they are situated and shaped as 

 follows: (r) at the posterior end of the bursa, large and capsule- 

 like showing a tendency to division intD two compartments ; (2) 

 i.nmediately in fro:it of r, cap5ule-lik2 bai: somewhat smaller; (3) 

 shortly behind the anus; (4) shortly in front of th2 anus; (5) 

 opposite the junction of the vas deferens and intestine with the 

 cloaca; (6) midway between the anus and the sucker ; (7) opposite 

 the sucker; -8) "14 mm. in front of the sucker. 



The median series consists of two papillae which are slightly 

 raised above the surface — im. shortly in front of the anogenital 

 aperture; 2m, — shortly in front of the termination of the vas 

 deferens. 



The space between the two cushions is flat and contains the 

 anogenital aperture and sucker. The former is surrounded by a 

 ring-like thickening of cuticle. The latter is slightly raised above 

 the surface and resembles a flattened volcano. It does not possess 

 a cuticular cup. It is situated "45 mm. from the tip of the tail. 



