SPIRURIDAE 229 



Hab. Small intestine of a Marsupial (Perameles) . 

 Genotype : E. [Hoplocej^Jialus] cinctum (v. Linstow, 1898). 



V. Linstow, 1898, Denkschr. med.-nat. Oes. Jena, (12) viii, 

 469; 1898, Zool. Centralbl., v, 672; Yorke & Maplestone, 

 1926, The Nematode Parasites of Vertebrates, London, 347. 



Appendix to Spiruridae. 

 a. Oslerus Hall, 1921. 



Lips very inconspicuous. Structure of anterior end not 

 definitely known. Two unequal spicules present. Tail of 

 female rounded. Vulva near anus. Ovoviviparous, 



Hab. Air-passages of Canidae (one species known). 

 Genotype : O. [Filaria] osier i (Cobbold, 1879). 



Cobbold, 1879, Parasites, London, 304; Hall, 1921, Proc. 

 U.S. Nat. Mus., lix, 541. 



This genus is very imperfectly known. Hall (1921) has 

 suggested that it belongs to the Spiruridae, and is more or 

 less closely related to Gongylonema. This opinion appears 

 to be based on the position of the vulva. 



b. Ascarops van Beneden, 1873. 



This name was given by van Beneden to a larval worm, 

 A. minuta van Beneden, found encapsuled in the stomach- 

 wall of a Bat. The worm was subsequently referred by 

 von Linstow to Spiroptera, and appears to be a larval Spirurid. 



van Beneden, 1873, Mem. Acad. Roy. Sci. Belg., xl, 22 ; 

 V. Linstow, 1873, Compendium der Helminthologie, 13 ; 1909, 

 in Brauer, Siisswasserfauna Deutschlands, Heft 15, 65. 



c. Cephalacanthus Diesing, 1853, nee Lac6pede, 1802. 



The two species referred to this genus by Diesing are 

 larval Spiruridae, one of them being, according to Seurat, 

 the larva of Protospirura muris, the other probably that of 

 Physocephalus sexalatus. 



Diesing, 1853, Sitz. k. Akad. Wiss., Wien, x, 34; Seurat, 

 1916, Bidl. Sci. France et Belg., (7) xlix, 354. 



d. Mastophorus Diesing, 1853. 



The two forms referred to this genus by Diesing are appar- 

 ently larval Spiruridae. One of them, according to Seurat, 

 is the larva of Protospirura muris, the other perhaps that of 

 Physocephalus sexalattis. 



Diesing, 1853, Sitz. k. Akad. Wiss., Wien. x, 34; Seurat, 

 1916, Bull. Sci. France et Belg., (7) xlix, 358. 



