172 



UEMOIBS OF THE QVEEySLAXD iirSECM. 



length of the males was 40 mm., and of the females 55 mm. Schneider^- gives the 

 lengths as 16 and 20 mm. respectively : RailJiet" as 16 to 26 mm. and 20 to 34 mm. 

 for each ; Neumann** as 16 to 30 and 20 to 40 or even TO mm. respectively ; while 

 Travassos*^ 2i^es the same dimensions as Railliet. The account and figure given 

 by Travassos ditfer somewhat from those of earlier parasitologists, particularly in 

 regard to the number and disposition of the male papillae. 



On account of the discrepancies I have deemed it ad\'isable to give a few 

 figures. Most of my mature specimens are much longer than the average mentioned 

 by the authors quoted. The difference between the sexes is not readilj- recognised 

 by the naked eye, though mature females not infrequently assume a lancet-like form. 

 The shape of the anterior and posterior ends is shown in the accompanying figures. 



Fig. 5. — A^aridia c^umhce. Anterior end — dorsal view, ala, ala ; d.l., dorsal lip; n.r., 

 nerve ring ; p., papilla on dorsal lip ; phar., pharynx i v.hl., ventral lips. 



Fig. 6. — Lips, &c. 



The three lips are practically equal in size. The dorsal Up is provided with 

 two small papilla. On the ventral surface of the parasite, just behind the lateral 

 lips, there may be seen a transverse fold of the cuticle. At each side of the anterior 

 end of the worm is a more or less broad though delicate ala of an elliptical outline, 

 extending backwardly for .some Uttle distance. The nerve-ring in large specimens 

 lies at about -5 mm. behind the anterior extremit3-. 



The vagina opens at about the midregion of the body. There is a hollowing 

 of the end of the female between the relatively wide anal aperture and the tip of the 

 tail. Eggs measure from -06 to -07 mm. in length by about -04 mm. in breadth. 



" Schneider, Monograpbie der Xematoden, 1866, p. 72, 



" Railliet, Traits de zoologie medicale et agricole. edit. 2, 1895. 



" Neumann, Parasites et maladies parasitaires des oiseaux domestiques 1907, p. 146 ; also 

 in Trait e des maladies parasitaires, Ac., edit. 2, 1892. 



"Travassos, Sobre as especias brazilieras da subfamilia Heteraking>, Mem, Inst, Oswaldo 

 Cruz, Rio de .laneiro, 5, 1913 (3). pp, 271-318. Reprint p 15, 



