158 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



150 to IGO/i. high. Three equal lips, the dorsal with 2 simple papillae, 

 the 2 latero-ventrals with a double papilla. Three large interlabia, 

 almost equal in height to the lips. No lateral alae. Cervical papillae 

 510/a from anterior end. Esophagus 3.3 to 4 mm. long, with post- 

 eriorly directed appendix 720ii to 1.04 mm. long; anteriorly directed 

 cecum 2.6 to 2.8 mm. long. 



Male 18.5 to 20 mm. long by 830/u, to 1.12 mm. wide. Tail curved 

 ventrally, without caudal alae; cloacal aperture 175/* from posterior 

 end. At least 33 pairs of caudal papillae arranged as follows: a 

 group of 4 papillae (the description does not say 4 pairs but that is 

 evidently intended) near caudal end, a double papilla posterior and 

 lateral to the cloacal aperture and a series of at least 28 preanal 

 papillae. Spicules equal, 3.6 mm. long, alate. 



232 ^v7 



233 



c-/mm 



Figs. 232-233. — Contraoaecum rosarium. 232, Anterior end. After Con- 

 nal, 1912. 233, Male tail. After Baylis and Daobney, 1922 



Female 22 to 25 mm. long by 940/* to 1.2 mm. wide. Tail conical, 

 with a papilla on each side, 120/x from posterior end. Anus 336/* 

 from end. Vulva not salient, at the anterior 3/10 of body length. 

 Eggs oval or globular, 69/* long by 54/* wide, with thick shells. 



Life history. — Unknown. 



Distribution. — Africa (Belgian Congo (Yumbi)). 



CONTRACAECUM ROSARIUM (Connal, 1912) Baylis, 1920b 



Synonym. — Ascaris rosarius Connal, 1912. 



Hosts. — Nycticorax griseus and Nycticorax, species. 



Location. — Proventriculus. 



Morphology. — C ontracaecum (p. 146) : Cuticle cross-striated and 

 with numerous regularly arranged refractile dots, as of beads of 

 rosary, along whole length. Three large fleshy lips (fig. 232), 

 concave internally and laterally; 3 interlabia also quite large, 

 triangular. Distinct articular collar around base of lips. Esophagus 

 3.9 mm. long (in the male), its appendix 700/* long. Cecum of 



