ASCARINAE 3 



uterus relatively long. Eggs globular or subglobular, with 

 a thin shell, the surface of which is pitted. 



Hab. Small intestine of carnivorous Mammals. 

 Genotype : T. [Lumbricus] canis (Werner, 1782). 



Werner, 1782, Vermium intestinalium brevis expositionis 

 continuatio, Leipzig, 11 ; Stiles, in Stiles & Hassall, 1905, 

 U.S. Dept. Agric, Bur. Anim. Indust. Bull. 79, 150; Leiper, 

 1907, Brit. Med. Journ., June 1, 1297 ; Railliet & Henry, 1911, 

 Comjot. rend. Soc. Biol., Paris, Ixx, 12; Stiles & Brown, 1924, 

 Journ. Parasitol., xi, 92. 



According to Stiles and Brown (1924), Werner's Lumbricus 

 canis is a recognizable species, because Rudolphi recognized 

 it and renamed it Ascaris marginata. If this reasoning is 

 sound, L. canis can be taken, as it was taken by Stiles (1905), 

 as the type of the genus to which Belascaris mystax (Zeder, 

 1800) also belongs. Belascaris thus becomes a synonym of 

 Toxocara. 



5. Toxascaris Leiper, 1907. 



Cervical alae present, finely striated. . Body bent dorsally 

 anteriorly. Lips as in Belascaris, but with anterior lobules 

 marked off from lobes by a deep groove, broad and bilobed at 

 their extremities. Interlabia absent. Oesophagus without 

 bulb. Tail of male conical, without digitiform appendage. 

 Caudal alae absent. On each side a group of five postanal 

 papillae near tip of tail (two subdorsal, one lateral, two sub- 

 ventral). A double subventral papilla between these and the 

 cloaca, and a row of at least twenty-five papillae, commencing 

 with a papilla behind the cloaca, the second of this series being 

 at the level of the cloacal opening. Spicules subequal, non- 

 alate. Vulva towards anterior third of body. Coils of female 

 genital tubes lie between vulva and posterior end of body. 

 Common trunk of uterus relatively short. Eggs subglobular, 

 with thick, smooth shell. 



Hab. Small intestine of carnivorous Mammals. 

 Genotype : T. [Ascaris] leonina (v. Linstow, 1902). 



V. Linstow, 1902, Arch.f. mikr. Anat., Ix, 217 ; Leiper, 1907, 

 Brit. Med. Journ., June 1, 1297; Railliet & Henry, 1911, 

 Compt. rend. Soc. Biol., Paris, Ixx, 12. 



6. Lagochllascaris Leiper, 1909. 



Lateral alae present throughout the whole length of the 

 body. Lips separated by a groove from the body. Free edge 

 of each lip deeply indented in the middle. Well-developed 

 interlabia present. Oesophagus simple. Tail of male bluntly 

 conical, slightly curved ventrally. Five pairs of postanal 

 papillae, those of the most anterior pair being large and having 



