178 STRONGYLOIDEA 



8. Pseudalius Dujardin, 1845. 



Bursa reduced to two elongate lateral lobes projecting 

 ventrally almost at right angles to the longitudinal axis of the 

 body, and containing each a lateral ray bearing on its inner 

 surface two papillary terminations, one near the extremity 

 and one near the base. These lobes are joined dorsally by a 

 flange of cuticle in the middle of which there is a slight 

 indication of a dorsal lobe. Spicules short, membranous, 

 folded, not fused at their tips. Posterior end of female bent 

 dorsally in front of the vulva. Vulva just in front of the 

 anus, at the extremity of a tubular outgrowth. Viviparous. 



Hab. Respiratory and circulatory systems of Porpoise (one 

 species known). 



Genotype : P. [Strongylus] inflexus (Rudolphi, 1809). 



Rudolphi, 1809, Entozoorum Hist, nat., ii, 227 ; Dujardin, 

 1845, Hist. nat. des Helminthes, Paris, 135 ; Baylis & Daubney, 

 1925, ParasitoL, xvii, 202. 



9. Stenurus Dujardin, 1845. 



Syn. Pharurus Leuckart, 1848 ; Prosthecosacter Diesing, 

 1851. 



A shallow buccal capsule present. Bursa fairly well 

 developed, more or less divided into a dorsal lobe and a pair 

 of lateral lobes. Each of the latter contains a lateral and a 

 ventral ray, the former with a trilobed extremity and a single 

 papillary termination on its inner surface, the latter also with 

 a single termination. Dorsal ray relatively elongate, with a 

 pair of ventral terminations near its tip. Spicules typically 

 broad, membranous, folded and apparently fused at their 

 tips. A flattened, tongue-shaped accessory piece present. 

 Tail of female with a small terminal process or button, situated 

 dorsally. Anus subterminal. Vulva just in front of anus, 

 with a cuticular process or swelling on its anterior lip. 

 Viviparous. 



Hab. Tympanic cavity, blood-sinusus of head, and respir- 

 atory passages of Cetacea. 



Genot3rpe : S. [Strongrjlus] minor (Kuhn, 1829). 



Kuhn, 1830 [1829], Mem. Mus. Hist, nat., Paris, xviii 

 363 ; Dujardin, 1845, Hist. nat. des Helminthes, Paris, 266 

 Schneider, 1866, Monographie der Nematoden, Berlin, 174 

 Baylis & Daubney, 1925, ParasitoL, xvii, 204. 



10. Filaroides van Beneden, 1858. 



A very shallow buccal capsule present, with slightly thick- 

 ened wails. Tail of male bears two subventral, kidney-shaped 

 swellings, each with five papiUae (of which two are lateral and 



