NEMATODE PARASITES OF BIRDS 



109 



row, finely striated transversely. Mouth hexagonal, with 6 small 

 papillae (fig. 154). Mouth cavity straight, with thick walls which 

 have a characteristic bend. Three rounded teeth at entrance to 

 esophagus. Esophagus with bulb. 



Figs'. .151— 152. — Subuluba acutissima. 151, Head, a, Side view; 6, front view. 152, 

 Male tail. After Dkasche, 1882 



Male 7 to 10 mm. long by 330/* wide. Lateral alae extend from 

 head to middle part of body. Esophagus 1.29 mm. long. Tail (fig. 

 155) curved ventrally; cloacal aperture 169/* from end. Preanal 

 sucker 169/* long, without rim, 719/* from posterior end of body. 

 Eleven pairs of papillae, of which 3 are preanal and ventral, 2 



. /J6 6 



Figs. 153-156. — Slbuluha allodapa. 153, Anterior end. After IUkrbto. 1918. 154, 

 Head, front view. After Dhasciie, 1882. 155, Male tail. After Drasciie, 1882. 

 156, a and b, Ovbjkctoe, After Babrkto, 1018 



adanal lateral and 6 postanal lateral. Barreto describes the spicules 

 as 1.525 and 0.465 mm. long but his figure shows no such great dif- 

 ference in length and suggests that the second measurement should 

 be 1.465 mm. Gubernaculum 152it long. 



Female 10 to 14 mm. long by 440/*. wide. Lateral alae extend only 

 along anterior third of body. Esophagus, exclusive of bulb, 1.34 



