NEMATODE PARASITES OF BIRDS 275 



terior to cordons in lateral fields. Body cuticula with pronounced 

 transverse striations, the body margin presenting a serrate appear- 

 ance. Pharynx (anterior esophagus of Dujardin) 170/* long; an- 

 terior esophagus (posterior esophagus of Dujardin) 650/* long by 

 30/* wide; posterior esophagus (ventricule of Dujardin) 2.1G mm. 

 long. 



Mole 10 mm. long by 100/* wide. Cordons extend 228/* from head. 

 Posterior extremity of body rolled spirally in 3 or 4 turns. Six to 7 

 pairs of papillae. Cloacal aperture 63/* from tail end. Spicules 

 indistinct, apparently 60/* and 110/* long. 



Female 11.6 mm. long by 290/* wide (Dujardin) or 7.5 to 8.5 mm. 

 long by 290/* wide (Skrjabin). Cordons extend 310/* from head end 

 (Dujardin) or 425/* from head end (Skrjabin) then recurrent and 

 anastomosing, forming a closed arc 230/* from head end, the cordons 

 gradually increasing in width and attaining a maximum width in the 

 recurrent part, according to Seurat. Tricuspid cervical papillae 

 560/* from head end. Pharynx 210/* long, slender; anterior esopha- 

 gus 850/* long. Caudal extremity thick, in the form of a short obtuse 

 cone, the anus 68/* (Skrjabin) from tail end (fig. 338&). Vuiva 640 

 or TOO/i from tail end. Eggs elliptical, 20 to 23/* long (Dujardin) or 

 30/* by 25/* (Skrjabin). 



Life history. — Unknown ; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe (France and Russia). 



SYNHIMANTUS DENTICULATA (Molin, 1860) Skrjabin, 1924 



Synonyms. — Dispharagus denticwlatus Molin, 1860c?; Dispharagus 

 falconis-subbuteonis Diesing, 1851; Spiroptera falconis-subbuteonis 

 (Diesing, 1851) Diesing, 1851. 



Hosts. — Primary : Falco subbuteo; secondary : Unknown. 



Location. — Esophagus. 



Morphology. — Synhiinantus (p. 272) : Mouth with '2 papilliform 

 projecting lips (fig. 335)). Body transversely striated, the striations 

 distinctly denticulate, 5/* apart anteriorly and gradually becoming 8/* 

 apart posteriorly. Cordons thick, recurrent to midlength, anasto- 

 mosing in pairs. 



Male unknown. 



Female 20 mm. long by 200/* wide. Cordons extend posteriorly 

 520/* from head end; anastomosis 270/* from head end. Eggs elon- 

 gate oval, 36/* by 16/*. 



Life history. — Unknown; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe (France (Kennes)). 



