282 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



This species was described by Rudolphi (1809) as Ascaris sagit- 

 tata, and the name Spiroptera alata Rudolphi, 1819, was a deliberate 

 renaming of a described species. There is no reason known to the 

 present writer why sagittata, which is not a nomen nudum, synonym 

 or homonym, should be dropped and alata used, and the name S. 

 sagittata is therefore used here in preference to the commonly used 

 specific name alata in combination with the generic name Synhiman- 

 tus. 



SYNHIMANTUS SUBRECTA (Gendre, 1921) Cram, 1927 



Synonym. — Acuaria ( Synhimantus ) subrecta Gendre, 1921a. 



Hosts. — Primary: AsturinuJa monogrammica; secondary: Un- 

 known. 



Location. — Stomach ( gizzard ? ) . 



Morphology. — Synhimantus (p. 272) : External morphology simi- 

 lar to S. laticeps. Cordons recurrent and anastomosing at almost the 

 anterior third of their length, without, however, quite reaching this 

 level. Tricuspid papillae posterior to cordons. 



Male 6.4 to 6.8 mm. long by 250/* wide. Cordons 350 to 360/* long. 

 Cloacal aperture 380/* from tail end, or 10/169 of total body length. 

 Four pairs of preanal and 5 pairs of postanal papillae (fig. 348 a), 

 the latter arranged in 3 groups, one group of 2 pairs just posterior 

 to cloacal aperture, one group of 2 pairs in middle of caudal alae, 

 and one group of 1 pair near the tail end. Caudal alae covered with 

 brilliant granulations, the alae large and thick, extending 800/* an- 

 terior to cloacal aperture, and continuing even beyond this in the 

 form of a cuticular pad. Spicules very unequal, the left (fig. 348 c 

 and d) 950 to 960/* long, the right (fig. 348 b) 200 to 210/* long; these 

 distinguish this species from S. laticeps. 



Female 10.4 to 10.5 mm. long by 330 to 370/* wide. Cordons 420 

 to 430/* long. Anus 200 to 210/* from tail end, or 10/495 to 10/518 of 

 total body length from tail end (fig. 348 e) . Posterior extremity coni- 

 cal, rounded at end. Vulva a little posterior to middle of body, or 10/19 

 of distance from head. Ovejector directed posteriorly, composed of a 

 large vestibule 270/* long, followed by a sphincter 200/* long; the 

 varnish gland or trompe is very short and divides into 2 branches 

 which immediately diverge. Eggs 37/* by 22/*, embryonated when 

 oviposited. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Africa (Dahomey) . 



SYNHIMANTUS SYGMOIDEA (Molin, 1860) Skrjabin, 1924 



Synony?ns. — Dispharagus sygmoideus Molin I860*?; Acuaria syg- 

 moidea (Molin, 1860) Railliet, Henry, and Sisoff, 1912. 



