14:8 On Crassicauda crassicauda [Crepl.) and its Hosts. 



the body. The expression " nodulis experte " would appear 

 To mean tliat Creplin did not observe any circumoral papillfe. 

 I have, however, satisfied myself that tliese are present, and 

 have a definite arranoement. On either side of the moutl!, 

 situated in the middle of its length and very close to its 

 margin, there is a small rounded papilla. Laterally to this 

 there are, towards each side of the extremity of the head, 

 three more papillse, considerably larger than tbose first 

 mentioned. Tiiere are thus four pairs of papillae in all. The 

 six outer papillae are mastoid in shape and but sliohtly raised 

 above the general surface of tiie cuticle. Those of the middle 

 pair project in a forward direction, while the other^ four 



01 mm. 

 Head-end of Crassicauda crassicauda (Crept.). 



])a{)illfe, re[)resentiiig, as it were, the corners of a square, are 

 more laterally directed. 



It will be seen that the general appearance of the mouth 

 and papillae is very Filaria-Wke. Except for a difference in 

 the number of the outer papilla?, there is a close resemblance, 

 for example, to the arrangement seen in Filaria horrida'^. 

 Although, as Leiper and Atkinson have pointed outf, there 

 is reasonable ground for separating this species from the 

 genus Filaria, sensii stricto, yet the characters of the moutli 

 and papillae, as exhibited by the present example, seem to 

 indicate a very close relationship to that genus. 



* See Schneider, * Monograpliie der Nematoden,' pi. v. fig. 17. 

 t L. c. pp. 29-30. 



