THE NEMATODE FAMILY GXATIIOSTOMID.E. 



259 



1. Tanqua tiara* (v. Linst., 1879). (Text-figs 7-15; PI. III. 

 figs. 11-13.) 



Ascaris tiara v. Linstow (1879, p. 320 ; pi. v. fig. 1). 



„ Parona (1898, p. 114). 

 Ctenocephalus tiara v. Linstow (1904 p. 102; pi. ii. figs. 

 23-27). 



Tanqua tiara R. Blanchard (1904, p. 478). 

 „ Leiper (1908, p. 189). 



„ (in part) Ba,ylis (1916, p. 224 ; text-fig. 1). 

 Tetradenos tiara v. Linstow (1904 p. 301). 



(1906, p. 173). 



The specimens from Tropidonotus asperrimus, previously re- 

 ferred by one of us (Baylis, 1916) to this species, have now ])een 



Text-figure 7. 



r , t. 



Tanqua tiara. The head ; dorsal (or ventral) view. 



redetermined as T. anomala (v. Linst.) {q. v.), T. tiara being- 

 restricted to the forms from various species of Monitor lizards 

 (Ya,ranida3). The description of the caudal papillas of the male of 

 T. tiara then given was correct, though the specimen figured 

 {I. c, text-fig. 2, p. 226) was not T. tiara, but T. anomala, which 

 in this respect is hardly distinguishable from it. The structure 

 of the female genital apparatus was not completely elucidated, 

 and will be o'iven here in neater detail. 



o o 



For specific diagnosis, see p. 261. 



Proc. Zool. Soc— 1920, No. XYIII. 



18 



