228 FILARIOIDEA 



lips. Male unknown. Body of female tapering anteriorly, 

 thickened posteriorly, rounded behind, with a terminal caudal 

 spike. Cuticle bears three longitudinal series of large, 

 posteriorly-directed hooks. Internal anatomy undescribed. 



Hab. Small intestine of a Rodent (one species known). 

 Genotyi^e : R. [Ophiostomum] amphiacantJmvi (Diesing, 

 1851). 



Diesing, 1851, Systema Helminthmn, ii, 246; v. Drasche, 

 1883, Verh. k. k. Zool.-bot. Ges., Wien, xxxii, 123; Hall, 1916, 

 Proc. U.S. Nat. Mus., 1, 175. 



12. Pneumonema Johnston, 1916. 



Anterior end curved slightly dorsally. Lips trilobed. 

 Buccal capsule greatly reduced or absent. Two successive 

 pairs of short cervical alae present, followed on each side 

 by two longitudinal rows of Ijackwardly-directed, thorn-like 

 spines, extending backwards for about one-third of the 

 length of the body, the spines becoming smaller posteriorly. 

 Oesophagus with a short, anterior, muscular portion and a 

 longer, glandular posterior portion. Male unknown. Tail 

 of female tapering. Vulva near the middle of the body. 

 Uterine branches opposed. Oviparous. Eggs thin-shelled, 

 containing embryos when laid. 



Hab. Lungs of a Lizard (Tiliqua). 

 Genotype : P. tiliquae Johnston, 1916. 



Breinl, 1913, Rep. Austr. Inst. Trop. Med. (1911), 39-46; 

 Johnston, 1916, Proc. Roy. Soc. Queensland, Brisbane, xxviii, 

 58; and 1918, xxx, 214; Yorke & Maplestone, 1926, The 

 Nematode Parasites of Vertebrates, London, 346. 



13. Echinonema v. Linstow, 1898. 



Syn. Hoplocephalus v. Linstow, 1898, nee Cuvier, 1829. 



Cuticle of head somewhat dilated, bearing thi'ee circles of 

 long, posteriorly-directed spines. Cuticle of body, in anterior 

 region, also bears numerous sj^ines, arranged in transverse 

 rings and also forming longitudinal rows, and decreasing in 

 size posteriorly. Mouth subterminal. Buccal cavity greatly 

 reduced. Oesophagus relatively short, not distinctly divided 

 into two portions. Tail of male short, conical, without 

 caudal alae. Three pairs of preanal and three of postanal, 

 sessile, subventral papillae, and a more lateral pair at the 

 level of the cloaca. There is also a group of very small 

 papillae near the tip of the tail. Sj^icules equal, simple, 

 tubular. An accessory piece present. Tail of female pointed. 

 Vulva at about the anterior third or fourth of the body. 

 Oviparous. Eggs spherical, containing embryos when laid. 



