OBSERVATIONS ON FILARIA VOLVULUS 



303 



simple. The alimentary canal is simple, straight and opens termi- 



nally. Other canals can be seen in the body cavity, probably water 



vascular and reproductive Systems. 

 The tail [ûg. 2) is very markedly incurvaled. At a distance of 49 a 



from the extremity, the anal orifice can be seen. Posterior to this, 

 the tail is narrow, 28 [x; immediately anterior, it 

 measures 44 a, while jiist where the incurvature 

 ends the diameter has increased to 64 [j.. The 

 extrême end of the tail, on the concave side, is 

 tlattened, and at this point, four papillae ari-an- 



Fig. 1. — Head of the 

 maie. — A, after a 

 pencil drawing; B, 

 after a photograpb. 



Fi'j. i. — Tail of the maie. 



ged one behind the other can be seen. Tliese appear to me to be in 

 pairs, as ou focussing carefully past them, the dim outlines of 

 others can be seen. 



The anal oritîce itself, is seen to hâve one post-, (me pre anal, and 

 two latéral papillas. Probably a similar number is to be found on 

 the other side giving a total of eight anal papillae. 



From the orifice a spicule projects for a distance of 18 a. The 

 extremity of this is slightly clubbed, from which it expands gra- 



