NEMATODE PARASITES OP BIRDS 



349 



Male 2.16 mm. long by 75/t wide. Body slender (fig. 413<? and 

 413/) and with 2 longitudinal rows of spines, directed backward, 

 on each side of the lateral lines ; thus there are 2 latero-dorsal and 2 

 latero-ventral rows. Lateral lines well marked, presenting a cuti- 

 cular crest, slightly salient, extending the entire length of the body 

 (Seurat does not show these in his figure). Buccal capsule short 

 (10/*,) ; pharynx 28G> long, encircled in its posterior third by the 

 nerve ring. Combined length of pharynx and esophagus 1/3 that 

 of body. Cervical papillae GO and 9G>, respectively, from an- 

 terior end. Cloaca 11G> from posterior extremity. Two papillae 

 toward the posterior third of the tail. Only one spicule present, 

 slender, filiform, winged, measuring 480/* long. Anterior to the 

 cloaca there is a feebly chitinized organ, the gorgeret, and at the 



SOP," 



Fig. 413. — Tetrameres nouveli. a, Female; b, ovejector ; c, seminal receptacle 



AND OVIDUCT ; d, EGO WITH FILAMENTS ; C, HEAD END OF MALE ; f, TAIL END OF MALE. 

 (500/1 SCALE FOR a TO C ; 100 M SCALE FOR d TO f. ) AFTER SEURAT, 1914 



side of this a chitinized part which Seurat regards as the rudiment 

 of a second spicule. 



Female 1.7 mm. long. Body subglobular (fig. 413a). The 

 strongly distended median region of body measures 1 mm. long by 

 85G> maximum width. Buccal capsule 15/x long; pharynx 21G> 

 long, encircled in its posterior third by the nerve ring. Combined 

 length of pharynx and esophagus 1 mm. Cervical papillae 77/x and 

 87/x, respectively, from anterior end. Excretory pore ventral, 50> 

 posterior to nerve ring. Anus 175/* from posterior extremity. Vulva 

 L20> anterior to anus. Ovejector (fig. 413 b) of type of that of 

 T. inermis; vestibule 750/* long, cylindrical, ending in a slightly 

 swollen oval part. Sphincter very clear. Trompe Y-shaped, with a 

 short unpaired branch and Avith paired branches running parallel to 

 a length of 1 mm. Uteri parallel, very narrow (50/*), the distal 

 end swollen into an enormus seminal receptacle (fig. 413c), its trans- 

 verse diameter being 125//.. Oviducts and ovaries 4 mm. long. Eggs 



