290 



Mr. H. A. Baylis on some 



is surrounded by papillae, of vvliich two are lateral (fig. 5, l.p.) 

 and four subniediaii (fig. 5, s.in.p.), the latter being apparently 

 double papilhe. The terminations of the papillae are at the 

 bases of small fuuiiel-like cuticular depressions. Tiie ceso- 

 j)hagus is simple, increasing slightly in diameter posteriorly, 

 and both it and the anterior part of the intestine are very 

 slender. The length of the oesophagus is 1'2 mm. in the 

 male and 1"3 mm. in the female. There is a pair of very 

 })rominent lateral neck-papillae situated at about half the length 



Fig. 7. 



Thdazia ilep'essa. Tail of female ; ventral view. 

 C.J5., caudal papilla. 



ot" the cjcsophagus from the anterior end. The nerve-ring 

 surrounds the oesophagus at 0*5 mm. from the head-end. No 

 excretory pore has been detected. 



The tail, in both sexes, ends bluntly in a slight knob-like 

 swelling, which is most pronounced in the female. The 

 caudal end of the male (fig. 6) is curved towards the ventral 

 side, and the tail itself measures 0*3 umi. in length. There 

 are no caudal alffi. The caudal papillae are small ; there are 

 about fifteen pairs — four postanal (close together), one pair 



