NEMATODE PARASITES OF BIRDS 



337 



tudinal furrows (fig. 399 b and c). Cuticle transversely striated. 

 Extremities of body acutely conical. Intestine filled with grayish 

 material. 



Life history. — Probably similar in a general way to that of T. 

 fissispina (p. 343). 



Distribution. — South America (Brazil). 



TETRAMERES AMERICANA, new species 



Hosts. — Primary: Gallus gallus; secondary: Unknown; probably 

 similar in a general way to that of T. ftssispina (p. 343). 



Fig. 400. — Tetrameues pakaduxa. «, Head (whether of male or female not 

 stated) ; b, -male tail. after drasche, 1884 



Location. — Proventriculus. 



Morphology. — Tetrameres (p. 334) : Mouth with 3 small lips; buc- 

 cal capsule with chitinous walls. Slender muscular pharynx present, 

 followed by esophagus. In other respects male and female very 

 dissimilar. 



Male 5 to 5.5 mm. long by 11G to 133/* wide. Two double rows of 

 posteriorly directed spines extend throughout whole body length, in 

 the submedian lines. Buccal capsule (fig. 402 a) 27/*. deep by 4.5/* 



Fig. 401. — Tetrameres Americana. Posterior end of male. Original 



wide: pharynx 365/w long; esophagus 996/* long. Cervical papillae, 

 one slightly higher than the other, 183 and 199/* respectively from 

 anterior end. Nerve ring just posterior to the latter papilla. Tail 

 (fig. 401) long and slender, cloaca! aperture 232 to 290/* from 

 posterior end. Two unequal spicules, KM)/* and 290 to 312/* long 

 respectively, not heavily chitinized. 



Fenwle 3.5 to 4.5 mm. long by 3 mm. Avide; body globulin- (fig. 

 402/), blood-red in color (when alive), with 4 longitudinal furrows 

 corresponding to the lateral and median lines. The anterior ex- 

 tremity (fig. 402c) protrudes from the globular body for a length 



