126 



On Oxyuris paronai, v. Linst. 



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

 (4) the much finer striation of 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 square brackets have 

 been calculated from von Linstow's proportional measurements.) 





References. 



Linstow, O. von. (1893.) " Oxyuris paronai, n. sp. ; und Cheiraeanthus 

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



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

 Rend. Soc. Biol., Paris, lxxix. p. 113. 



Schneider, A. (1866.) ' Monographie 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 this. 



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

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

 as the two forms were not distinguished by him. 



