NEMATODE PAKASITES OF BIRDS 391 



DISPHARYNX, new species? 



Synonym. — Dispharagus new species ? of Smit and Notosoediro, 

 1926. 30 From the gizzard of the Java cock. 



Morphology. — Dispharynx (p. 237) : Mouth with two lips. Mouth 

 cavity becomes narrower at base. Mouth cavity 100/x to 116/a deep; 

 length of esophagus 750/*, (this the length of only the first part of 

 the esophagus ? In the illustration the cordons extend about 2/3 

 the length of the anterior or muscular esophagus). Cordons extend 

 posteriorly for a distance of 500^, then recurve and extend anteriorly 

 almost to the mouth. Male 5 mm. long. Eight pairs of caudal 

 papillae, of which four are preanal, four postanal. Spicules unequal, 

 the left 335/* long and thin, the right short (120/1, long) and thick. 

 Female 6 mm. long. Anus 166/t from posterior end of body ; vulva 

 1.22 mm. anterior to anus. Eggs 37/a by 20/*. 



This is apparently a new species of Dispharynx ,' it resembles most 

 closely Dispharynx rectovaginata in size and in having only four 

 pairs of postanal papillae, but in D. rectovaginata the left spicule is 

 twice as long as the right, in this species more than that. The hosts 

 and distribution in the two cases are also very different. 



Yorke and Maplestone have recently published a volume 31 which 

 will prove of inestimable aid in systematic work with nematodes. 

 This comprehensive study gives diagnoses and keys from orders 

 down to genera, with text figures illustrating one species, usually the 

 type species, of each genus. The classification used by these authors 

 differs in certain respects from that followed in the present study of 

 bird nematodes. Yorke and Maplestone have not employed the 

 orders Myosyringata and Trichosyringata, but have used Eunema- 

 toda Ward, 1916, and Gordiacea Siebold, 1848, as the orders; the 

 superfamilies within each order are then considered, suborders not 

 having been employed as they have been in the present study. Yorke 

 and Maplestone have made a new family Subuluridae, whereas I have 

 followed Travassos in using the subfamily Subulurinae in the family 

 Heterakidae. They have put Heterakidae and Subuluridae in the 

 Oxyuroidea, whereas I considered them as Ascaroidea, as did Hall 

 (1916). In Yorke and Maplestone's classification Yseria has been 

 made a synonym of fitreptocara, and this genus put in the Physa- 

 lopterinae; I have put Yseria in Schistorophinae, Gedoelst having 

 indicated that it is closely related to HistiocephaJus, and have not 

 considered its festoons as analogous to cordons, whereas the denticu- 

 lated collar of Streptocara is considered an analogous structure and 

 this genus accordingly allocated to Acuariinae. Yorke and Maple- 

 stone list only Yseria califomica, the second species which I included 



80 Nedrl.-Ind. Blad. v. Diergeneesk., Buitonzorp. vol. 38, pp. 95-07. 4 figs. 



81 102C : The Nematode Parasites of Vertebrates. 536 pp., 307 fi^s. London. 



