290 



Mr. H. A. Baylis on tome 



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

 and four subniedian (fig. 5, s.m.p.), the latter being apparently 

 double papillae. The terminations of the papillae are at the 

 bases of small funnel-like cuticular depressions. The oeso- 

 phagus 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 

 prominent lateral neck-papillse situated at about half the length 



Fig. 7. 



Thelazia depressa. Tail of female ; ventral view. 

 e.p. f caudal papilla. 



of the oesophagus 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 (tig. 6) is curved towards the ventral 

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

 are no caudal alae. Tire caudal papillae are small ; there are 

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



