12 ASCAROIDEA 



Hab. Alimentary canal of Pea-fowl (one species known). 

 Genotype : P. pavonis Baylis & Daubney, 1922. 



Baylis & Daubney, 1922, Mem. Ind. Mus., vii, 297. 



3. Ascaridia Dujardin, 1845. 



Lips well developed, without " cordons." Oesophagus club- 

 shaped, without posterior bulb. Male with slight caudal 

 alae and relatively large caudal papillae. Spicules equal or 

 subequal. No accessory piece. Uterine branches opposed. 

 Eggs with an internal thickening of the shell at one pole. 



Hab. Small intestine of Birds and Reptiles. 

 Genotype : A. [Ascaris] hermaphrodita (Frolich, 1789). 



Frolich, 1789, Naturforscher, Halle, xxiv, 151 ; Dujardin, 

 1845, Histoire naturelle des Helminthes, Paris, 151, 214; 

 Travassos, 1913, Mem. Inst. Osic. Cruz, Rio de Janeiro, v, 

 288; Lane, 1914, Ind. Journ. Med. Res., ii, 662, and 1917, 

 iv, 756. 



On the ground of the absence of an oesophageal bulb 

 Travassos (1920 ( ?), Eev. Vet. e Zootech., Rio de Janeiro, 64) 

 places this genus in a subfamily Ascaridiinae of the family 

 Ascaridae. In our view the presence of a typical caudal 

 sucker with a chitinoid border in the male necessitates its 

 inclusion among the Heterakidae, as was originally proposed 

 by Railliet & Henry (1914, Proc. Internal. Zool. Congr., 677). 



4. Aspidodera RailHet & Henry, 1912. 



Syn. As2oidocephalus Diesing, 1851, nee Motasch, 1839. 



Lips with "cordons" ojiening in pairs at the intevlabial spaces, 

 diverging and recurrent, the recurrent branches anastomosing 

 on the outer surfaces of the lips. Oesophagus, as in Heterakis 

 and Pseudaspidodera, with a pharynx and a well-developed 

 posterior p3T:iform bulb. Male without caudal alae. Spicules 

 equal. An accessory piece present. Uterine branches 

 opposed. Eggs thin- shelled. 



Hab. Alimentary canal of Edentates and Marsupials. 

 Genotype : A. [Asjndocephalus] scoleciformis (Diesing, 

 1851). 



Diesing, 1851, Systema Helminthum, ii, 208; Railliet & 

 Henry, 1912, Btdl. Soc. Path, exot., Paris, v, 257 ; 1913, Bull. 

 Mus. Hist. Nat., Paris, 93. 



5. Paraspidodera Travassos, 1914. 



Lips large and well developed, resembling those of Ascaris, 

 without "cordons." Oesophagus with a pharynx and a 



