NEMATODE PARASITES OF BIRDS 



229 



CHEILOSPIRURA ROTUNDATA (Linstow, 1907) Stiles and Hassall, 1920 



Synonym's. — Dispharagus rotundatus Linstow, 1907; Acuaria ro- 

 tundata (Linstow, 1907) Railliet, Henry and Sisoff, 1912. 



Hosts. — Primary: Lanius minor; secondary: Unknown. 



Location. — In the lower jaw, according to Linstow (possibly an- 

 terior end of esophagus?). 



Morphology. — Cheilospirura (p. 226) : Cuticle thick, finely striated 

 transversely. Head attenuated, with 2 papilliform lips. Cervical 

 papillae 320//. from head end. Cordons extend 480/* posterior to 

 head, not to posterior end of esophagus, the latter being very long. 



Male 7.9 mm. long by 320/* wide. Esophagus 10/27 of body 

 length. Tail (fig. 292) 1/25 of body length. Four pairs of preanal 



Figs. 292-293. — 292, Cheilospirura kotundata. Male tail. After Linstow, 1907. 

 293, Cheilospihura spinosa. a, Anterior end; b, part of cordon; c, vulva; 

 d, female tail; c. .spicule. Original 



papillae and 5 pairs of postanal papillae. Spicules dissimilar, one 

 750/x long, slender, the other 180/* long, thick. 



Female 8.5 mm. long by 470/* wide. Esophagus 10/24 of body 

 length. Tail 1/48 of body length. Vulva in posterior part of body, 

 dividing body length into ratio of 34:7. Eggs thick-shelled, 34/* 

 by 21,*.' 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Asia (Turkestan ) . 



CHEILOSPIRURA SPINOSA. new species 



Synonym. — Acuaria {Cheilospirura) species Stafseth and Kothin, 

 1925. 



Hosts. — Primary: Bonasa umbellus; secondary: Unknown. 



Location. — Gizzard. 



Morphology. — Cheilospirura (p. 226) : Mouth (fig. 293«) with 2 

 triangular lips; at the base of each and projecting slightly beyond 



