190 STRONG YLOIDE A 



distally from, latere -ventral ray. Medio-lateral and postero- 

 lateral rays united for the proximal three-quarters of their 

 length in a common trunk which runs parallel to the antero- 

 lateral ray. Externo-dorsal rays originate high up on the 

 median dorsal stem. Dorsal ray long, stout, and cleft in 

 its distal half. Its terminations are bidigitate or tridigitate. 

 Spicules relatively short, twisted, foliaceous. Accessory piece 

 rudimentary or absent. 



Hab. SmaU intestine of Rodents. 



Genotype : V. [Viannaia] hydrocheri (Travassos, 1914). 



Travassos, 1914, Brazil Medico, Rio de Janeiro, xxviii, 32G ; 

 1920 (?), Rev. Vet. e Zooiech., Rio de Janeiro, G6; 1920, 

 Rev. Soc. Braz. Sci. (3), 204; 1921, Mem. Inst. Oswaldo Cruz, 

 Rio de Janeiro, xiii, 101. 



8. Impalaia Monnig, 1923. 



Body not spnally coiled. Cuticle with fine longitudinal 

 markings, but transversely striated only towards the anterior 

 end. The cervical region is studded with numerous irregular 

 tubercles. Cuticle of head inflated. Bursa hood-shaped, 

 without well-marked dorsal lobe. Ventral rays separate and 

 forwardly directed. Postero-lateral ray somewhat longer 

 than, and divergent from, the other lateral rays. Externo- 

 dorsal rays originate, at different levels, near the base of 

 the median dorsal stem. Dorsal ray stout near its base, 

 tapering distally and bifurcate near its tip. Its terminations 

 are bidigitate. Spicules long, filiform. An accessory piece 

 present. 



Hab. Intestine of an Antelope (one species known). 

 Genotype : /. tuberculata Monnig, 1923. 



Monnig, 1923, Trans. Roy. Soc. S. Africa, xi, 114. 



Appendix to Heligmosominae. 



The following genera are referred somewhat doubtfully 

 to this subfamily. 



9. Citellinema Hall, 1916. 



Cuticle of head inflated. Ventral rays and antero-lateral 

 ray originate from a common trunk which itself unites at 

 its base with the common trunk of the medio-lateral and 

 postero-lateral rays. Dorsal ray not examined. Spicules 

 bifurcating near their proximal ends to form each two long 

 filiform processes. Female unknown. 



Hab. Intestine of a Rodent (one species known). 

 Genotype : C. bifurcatum Hall, 1916. 



Hall, 1916, Proc. U.S. Nat. Mus., 1, 123, 141. 



