NEMATODE PARASITES OF BIRDS 



151 



each with 2 papillae. Interlabia well-developed, the margins in- 

 folded. No dentigerous ridges. Dorsal lip 110> high by 150> 

 wide at base, 140/x wide at anterior edge, four-sided, anterior edge 

 deeply grooved. Cuticle projecting beyond pulp on each side of 

 the saddle (like a "finger-nail") with ear-like projections. 



IQQh 200 300 y 



Fig. 220. — Contracaecum haliaeti. a, Lateral view; b, front view of head: 

 c, egg. After Smith, Fox, and White, 1908 



Esophagus long with small, inconspicuous, posterior bulb from 

 which there extends posteriorly an appendix. Intestinal cecum 

 large. 



Male unknown. 



Female 50 mm. long by 1.5 mm. wide. Head blunt, 250y wide at 

 base of lips. Tail acutely conical, anus subterminal. Vulva an- 



"S-wje to J* 4* to 



to to i^ to lo. 



FIG. 221. — CONTRACAECCM HALIAETI. a, INNER SURFACE; ft, OUTER SURFACE OF 



UP. After Smith, Fox, and White, 1008 



terior to middle of body, small and inconspicuous. Vagina long, 

 slender. Eggs (fig. 220c) of varying shape, from 80 to 90ju. long 

 by 50 to 60/* wide; shell thin, covered with small tubercle-like pro- 

 jections. 



Life history. — Unknown. 



Distribution. — North America (United States (Philadelphia 

 Zoological Garden)) and Asia (India). 



3(312— 27 12 



