TRICHOSTRONGYLINAE 183 



9. Ornithostrongylus Travassos, 1914. 



Syn. Cephalostrongylus Irwin-Smith, 1920. 



Cuticle of anterior end inflated. Buccal cavity with indi- 

 cations of chitinoid structure. Ventro-ventral and latero- 

 ventral rays of bursa equal in thickness and close to each 

 other. Poster o -lateral ray about as thick as, but divergent 

 from, the remaining lateral rays. Dorsal ray cleft for a 

 varying distance, up to half its total length ; each branch 

 ending in three or four digitations. Prebursal papillae 

 present. Spicules short, ending in three points. A " tela- 

 mon " present. Accessory piece apparently absent. Eggs 

 segmenting or containing embryos when deposited. 



Hab. Small intestine of Birds. 

 Genotype : O. fariai Travassos, 1914. 



Travassos, 1914, Brazil Medico, Rio de Janeiro, xxviii, 

 No. 17; 1921, Mem. Inst. Oswaldo Cruz, Rio de Janeiro, xiii, 

 1; Irwin-Smith, 1920, Proc. Linn. Soc. N.S.W., Sydney, xlv, 

 553. 



10. Trichohelix Ortlepp, 1922. 



Body spirally coiled. Cuticle of anterior end inflated, the 

 inflation limited behind by a deep constriction encircling 

 the neck. Cuticle of the rest of the body markedly inflated 

 and showing transverse striations only on the ventral surface 

 of the anterior half of the body. Longitudinal striations 

 faint. Cervical papillae absent. Bursa indistinctly trilobate. 

 Ventro-ventral ray curved ventrally at its tip, diverging 

 from latero- ventral ray. Antero-lateral ray rather divergent 

 from the remaining lateral rays. Tip of medio-lateral ray 

 sharply recurved inwards. Extemo-dorsal rays relatively 

 short and stout, originating from the median stem of the 

 dorsal ray near its base. Dorsal ray stout, cleft for about 

 one-third of its length, with tridigitate terminations. Pre- 

 bursal papillae absent. Spicules tubular, bifid distaUy. An 

 accessory piece present. Vulva slightly in front of anus. 

 Eggs segmenting when deposited. 



Hab. Intestine of Armadillos (one species known). 

 Genotjrpe : T. [Oesophagostomum] tuberculata (Parona and 

 Stossich, 1901). 



Parona and Stossich, 1901, Boll. Mus. Zool. Anat. Comp., 

 Genova (110), 1; 1902, Atti Soc. Ligust. Sci. nat., Genova, 

 xiii, 7 ; Ortlepp, 1922, Ann. Mag. Nat. Hist., (9) ix, 413. 



11. Oswaldocruzia Travassos, 1917. 



Cuticle of anterior end inflated and transversely striated. 

 Ventral rays of bursa close together and equal in size. Antero- 

 lateral ray divergent from the remaining lateral rays, not 



