1922.] 



H. A. Baylis and R. Daubney : Parasitic Nematodes. 



305 



In the female the tail is about i mm. long, and the caudal papillae are at 0*5 mm. 

 from the tip. The vulva is situated at 3-9-47 mm. from the posterior end. The 

 vagina is long, running forward for a distance of 23 

 mm. before giving off the uterine branches. The 

 eggs measure 0-125-0-137 x 0-075-0-087 mm. 



Falcaustra barbi, sp. now 



(Figs. 40, 41.) 



Host: Mahseer (Barbus tor). Locality : Torsa 

 River, Falakata, Eastern Bengal. 



This species measures 15-2-16-5 mm. x 0-65-07 

 mm. in the male; 15-5-19-6 mm. x 0-65-1-0 mm. in 

 the female. The cuticular stria'tions, if present, are 

 excessively fine. The almost globular head has a 

 diameter of 0-2-0-22 mm., and is followed by a 

 distinct neck. The buccal cavity measures about 

 0*07 mm. in length, the pharynx o*i mm. The 

 distance from the anterior end to the end of the 

 oesophagus, including the bulb, is 2*5-2-8 mm. 

 The anterior swelling of the bulb is oval in shape 



and sharply constricted off from both the preceding portion of the oesophagus and the 

 rest of the bulb. The dimensions of the bulb are 0-5-0-59 mm. in length and 034- 



9 



Fig. 40 — Falcaustra barbi. Pos- 

 terior end of male ; lateral view. 



m., caudal muscles; s., sucker-like 



Fig. 4L— Falcaustra barbi. Tail of male; lateral view. 

 a.p., accessory piece. 



