30 ASCAROIDEA 



Subfam. 2. COSMOCERCINAE EaiUiet, 1916. 



Lips apparent or obscure. Male with two equal or subequal 

 spicules and usually an accessory piece (absent in Isakis and 

 Odontogeton). 



1. Cosmocerca Diesing, 1861. 



8501. Nematoxys Schneider, 1866, e. p. ; Ananconus RaiUiet 

 & Henry, 1916. 



Lips not apparent. Oesophagus with a small pharynx, a 

 very slight prebulbar swelling and a posterior bulb. Well- 

 developed lateral alae present, extending posteriorly a little 

 behind the anus in the female. Tail of male with fine terminal 

 spike. Numerous small preanal and postanal papillae present, 

 with slender peduncles. On the ventral surface of the preanal 

 region in the male there are two longitudinal rows of comb- 

 like crests. Spicules short, equal. A strongly- chitinized 

 accessory piece present, sometimes larger than the spicules. 

 Vulva at about the middle of the body. Uterine branches 

 apparently opposed. 



Hab. Intestine and lungs (?) of Batrachians. 

 Genotjq^e : C. trisjnnosa RaiUiet & Henry, 1916 (= Oxyuris 

 ornata of Walter, 1856, nee Duj., 1845). 



Walter, 1856, Zeitschr. f. wiss. Zool., Leipzig, viii, 163 ; 

 RaiUiet & Henry, 1916, Compt. rend. Soc. Biol., Paris, Ixxix, 

 247. 



2. Aplectana RaiUiet & Henry, 1916. 



Syn. Nematoxys Schneider, 1866, e. p. ; Aplecta RaiUiet & 

 Henry, 1916. 



Lips fairly distinct. Buccal capsule absent. Oesophagus 

 with a very short pharynx and a posterior bulb, separated 

 from it by a constriction. Lateral alae present, extending 

 from near the anterior end to a little behind the anus. Tail 

 of male pointed, with numerous sessile postanal papiUae. 

 Spicules equal, short and slender. A large oblong accessory 

 piece present. Vulva slightly in front of the middle of the 

 body. Uterine branches apparently opposed. Embryos 

 hatch in utero. 



Hab. Alimentary canal of Amphibians. 



Genotyjie : A. [^Ascaris'] acuminata (Schrank, 1788) 

 (= Nemato.vys cotnmutatus of Schneider, 1866, iiec Cosmocerca 

 commutata Diesing, 1861). 



Dujardin, 1845, Histoire naturelle des Helminthes, Paris, 

 227 ; Schneider, 1866, Monographie der Nematoden, Berlin, 

 113; V. Linstow, 1909, in Brauer, Siissuusserfauna Deutschlands, 

 Heft 15, 58; RaiUiet & Henry, 1916, Compt. rend. Soc. Biol, 

 Paris, Ixxix, 248; 1916, Eec. Med. Vet., Paris, 426. 



