342 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



portion of body, near anus. At the beginning of the vagina, a 

 saccular dilatation (copulatory receptaculum) which is filled with 

 eggs in the adult worm. Eggs 33/a long by 24^ wide. 



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

 fissispina (p. 343). 



Distribution. — South America (Brazil). 



TETRAMERES DUBIA Travassos, 1917a 



Hosts. — Primary: Gallinago paraguaiae; secondary: Unknown; 

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



Location. — Proventriculus. 



Morphology. — Tetrameres (p. 334). 



Male 1.6 mm. long by 85/a wide. Body (fig. 406) attenuated at 

 the extremities, the greatest width being at the level of the esophagus. 

 Cuticle transversely striated and with spines in the lateral fields but 



Fig. 406. — Tetrameres dobia. Male. After Travassos, 1919 



only at the anterior extremity; the spines are few and very small. 

 Buccal capsule very small (6/* long by 4/* wide) ; pharynx 240/*, 

 long; esophagus 300/* long. Anus lOOju, from posterior extremity. 

 Tail sharply pointed with 4 pair of very small spines on the ventral 

 surface. Spicules of very unequal dimension, measuring respectively 

 720/* long by 6^ wide and 64/t long by 6/* wide. 



Female 2 to 2.5 mm. long by 1 to 1.55 mm. wide. Body globular, 

 red, with marked transverse striations and with 4 deep longitudinal 

 furrows corresponding to the median and longitudinal lines. Buc- 

 cal capsule barrel-shaped, 16/* long by 7/a wide. Anus 75/x from pos- 

 terior extremity. Ovejector 420/x long, of same type as that of T. 

 micropenis, the dilated part full of eggs. Eggs 49^ long by 35fi 

 wide. Mature eggs (that is, containing developed embryos) show 

 tufts of filaments at the poles; in immature eggs these are absent 



