24 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



body and 2.835 mm. from anus. Ovejector branches divergent; vesti- 

 bule 510/z long and containing only 3 eggs; trompe or varnish 

 gland (Seurat's "trompe " or "glande vernissante " might be termed 

 in English the glandular ovejector, making the parts of the ovejector 

 or the vestibule, glandular ovejector and muscular ovejector) 40/x 

 long; sphincter 105/* long. Uteri opposed; ovaries parallel. Eggs 

 80/* by 45/*, thick-shelled, and in blastula stage as oviposted. 



Life history. — Unknown; probably simple and direct. 



Distribution. — Africa ( Bone ) . 



AMIDOSTOMUM RAILLIETI Skrjabin, 1915 



Host. — Fulica atra and Fulica, species. 



Location. — Cecum and " stomach " wall. 



Morphology. — Amidostomum (p. 19) : White, cylindrical worms, 

 slightly attenuated anteriorly. Buccal capsule (fig. 15) with 1 large 

 tooth and 2 very small teeth disposed laterally. 



Male 5.5 to 7.9 mm. long by 200 to 255/* wide. Buccal capsule 27.5/x 

 wide. Bursa (fig. 16) with 2 large lateral lobes and a small but dis- 

 tinct dorsal lobe. Externo-dorsal ray originates in common with all 

 of the rays except the dorsal and is very short ; the postero-lateral is 

 also very short. All rays except the dorsal are confined to the lateral 

 lobes and all except the postero-lateral and the externo-dorsal extend 

 to the bursa margin. Dorsal ray bifurcating near distal end, each 

 branch again dividing unequally. Prebursal papillae present; geni- 

 tal cone with a pair of large papillae. Spicules 204/* long, irregular 

 in shape and each cleft distally along most of its length. Telamon 

 slender, 100/* long. 



Female 6.8 to 9.3 mm. long. Anus 110 to 145/* from posterior end 

 of body, the tail thus being considerably shorter than that of the 

 type-species. Vulva 1.3 to 1.8 mm. from tail end. Combined length 

 of ovejectors (including sphincters) 270 to 290/*. Eggs 90 to 105/x 

 by 50 to 65/*. 



Life history. — Unknown; probably simple and direct. 



Distribution. — Asia (Russian Turkestan) and Egypt. 



AMIDOSTOMUM ACUTUM (Lundahl, 1848) Scurat, 1918d 



Synonym. — Strongylus acutus Lundahl, 1848. 



Hosts. — Anas crecca, Oidemia fusca (Anas fusca, Fuligula fusca), 

 Oidemia nigra (Anas nigra, Fuligula nigra), Somateria mollissima 

 (Anas mollissima, Fuligula mollissima), Nyroca fidigula (Anas 

 fuligula) and Fuligula cristata. 



Location. — Gizzard. 



Morphology. — Amidostomum (p. 19) : Mouth aperture simple and 

 spherical. Body red, of rather uniform diameter except for an at- 



