NEMATODE PARASITES OF BIRDS 



267 



Morphology. — Streptocara (p. 2G4) : Head (fig. 329a) with 2 coni- 

 cal lips and rudimentary neck frills. Cervical papillae 140ft, from 

 head end, tricuspid. 



Male 7.58 mm. long by 250/* wide. Esophagus somewhat less than 

 1/2 the body length ; tail 1/20 of body length. Posterior extremity 

 (fig. 3296) rounded; caudal alae broad. Four pairs of preanal, 5 

 pairs of postanal pedunculated papillae. Spicules very unequal, the 

 longer 600/n, bearing a small terminal process projecting at right 

 angles, the shorter spicule 14G> long. 



Female 9.72 mm. long by 350/x wide. Esophagus 1/2.6, tail 1/81 of 

 body length. Vulva just anterior to end of esophagus. Eggs 39/x 

 long by 19ju, wide, with very thick shell. 



Figs. .".28-329. — 328. Streptocara pectinifera. a, Head end; b, 



CERVICAL. PAPILLAE ; C, MALE TAIL.. AFTER NEUMANN, 1900. 329, 



Streptocaba CIEROHaMata. a, Head; b, male tail. After Lin- 



siuiv, 1888 



Life history. — Unknown; see S. pectinifera, p. 266. 

 Distribution. — Not given. Collected on Challenger expedition. 



STREPTOCARA CRASSICAUDA (Creplin, 1829) Skrjabin, 1916b 



Synonyms. — Spiroptera crassicauda Creplin, 1829; Disp harag us 

 crassicauda (Creplin, 1829) Molin, L860; Streptocara crassicauda 

 anseri Skrjabin, 1916. 



Hosts. — Primary: Anas clangula, A. glacialis, A. tadorna, A. fusca, 

 A. bosclias, Alca torda, Bernicla sandwic hen-sis, Bnwephala cZamgula, 

 Colymbus arcticus, C rufovidgaris, C. septentrional is, Harelda <jl<i- 

 cialis, Mergus serrator, M. merganser, Nyroca clangula, Oidemda 

 fusca, Tadorna tadonia; secondary: Unknown: see S. pectimfera, 

 p. 266. 



L ocation . — Gizza rd. 



