350 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



54ju, long by 28/a wide, elliptical, slightly flattened on the side, with 

 thick shells; the embryonated eggs bear at each of the two poles 

 a tassel of long filaments (70/* in length). The filaments (fig. 

 •113 d) appear only as the embryo becomes fully developed; when the 

 egg is enclosed in the uterus the filaments are wrapped around it; 

 they unfold and spread out when the egg is set free in water. 



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

 ftssispina (p. 343). 



Distribution. — Africa (Algeria) . 



Fig. 414. — Tetrameres tetrica. Male. After Travassos, 1919 

 TETRAMERES TETRICA Travassos, 1917 



Host. — Primary: Ar amides cajanea; secondary: Unknown; prob- 

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



Location. — Proventriculus. 



Morphology. — Tetrameres (p. 334). 



Male 2.6 mm. long by 130 to 140/z wide (fig. 414). Cuticle trans- 

 versely striated and with numerous spines along median and lateral 

 lines. The spines commence 24/* from the anterior extremity where 

 they reach their greatest size (20^ long by 3/a wide) and then slowly 

 and progressively diminish to the posterior fourth of the body where 

 they disappear except on the ventral surface; there one finds 6 pairs 

 of preanal spines. Postanally there are 4 pairs of lateral spines and 

 also 4 pairs on the ventral surface of the tail. Buccal capsule 12/x 

 long by 6/t wide, irregular in shape. Pharynx 230^ long by 42/a wide. 

 Nerve ring 140/x from anterior extremity of body. Cloacal aperture 

 200/x from posterior extremity which is long and sharply pointed. 

 Two spicules of very different lengths, the larger 200/x long by 6/t 



