ART. 17 A NEW NEMATODE FEOM THE RHEA WEHR 



the presence of two lateral alae, which extend the entire length of 

 the body, and of four chitinous teeth surrounding the mouth cavity 

 differentiate S. sschokkei and the species here described as new. As 

 regards jS. uncinipenis (Molin, 1860), which has been redescribed 

 and placed in the genus Habronema by Walton (1927), the dissimilar 

 and ver}^ unequal spicules of this species, the different number and 

 arrangement of caudal papillae of the male, the differently shaped 

 interlabia, and other distinctions noted in an en face view of the 

 heads readily separate it from the present species. 



LITERATURE CITED 



CeAM, EL0ISE B. 



1927. Bird parasites of the nematode suborders Strongylata, Ascaridata, 

 and Spirurata. U. S. Nat. Mus. Bull. 140, xvi+465 pp., 444 figs. 

 Molin, R. 



1860. Una monografia del genera Spiroptera. Sitz. Akad. Wiss. Wien, 

 math.-nat. Chisse, vol. 38, pp. 911-1005. 

 Rah-liet, Alcide, and Henry, A. 



1911. Les helminthes du Naudou. Bull. Soc. Nat. d'Acclim. France, vol. 58, 

 no. 17, pp. 538^41 ; no. 18. pp. 573-582, 6 figs. 



RUDOLPHI, CAKL AsMUND. 



1819. Entozoorum synopsis cui accedunt mantissa duplex et indices locu- 



pletissimi, x+Sll pp., 3 pis. Berlin. 

 Walton, A. C. 



1927. A revision of the nematodes of the Leidy collections. Proc. Acad. 



Nat. Sci. Philadelphia, vol. 79, pp. 49-163. 



ZSCHOKKE, FBIEDRICH. 



1889. Spiroptera alata, ein neuer Nematode aus Rliea americana. Cen- 

 tralb. fur Bakt., Parasit., und Infekt., vol. 5, no. 24, pp. 792-794, 



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