126 



On Oxyuris paronai, v. Linst. 



the middle of the body, instead of behind it, as in P. paronai* ] 

 (4) the much finer striation o£ the cuticle (in the females of 

 P. paronai the striation is so coarse as to be conspicuous 

 under a very low power of the microscope) ; and (5) the 

 slightly larger dimensions of the eggs. 



Measurements o/Paracis paronai and Oxyuris loveiidgei. 



(All measurements are in mm. The figures in sqxiare brackets have 

 been calculated from von Linstow's proportional measuremeuta.) 



References. 



LiNSTOAV, O. VON. (1893.) " O.ruwis jJdronai, n. sp., und Cheiracmithus 

 hispidus, Fedt.," Arch. f. Xaturg., Berlin, lix. p. 201 ; pi. vii. 



Railliet, A., and Henby, A. (1916.) " Sur les Uxyurides," Compt. 

 Eend. Soc. Biol.. Paris, Ixxix. p. 113. 



Schneider, A. (1866.) ' Monogxaphie der Nematoden.' Berlin. 



* v. Linstow gives the proportion in which the vulva divides the 

 body as " 37 : 19." The vulva, though always behind the middle, is 

 usually much nearer to it than tliis. 



t The exceptionally large figure for the total length of the female 

 given by von Linstow was possibly based on a specimen of O. luveridyei, 

 as the two forms were not distinguished by him. 



