WORMS FROM MAMMALS WD BIRDS. 



501 



0-35 mm., the wider posterior region 8-8 mm. Tlie anus is sub- 

 tei'iiiiual. 



Vulva 0-55-0-6 min. from the oral extremity. The stout, 

 muscular vagina runs straight backwards, and has a length of 

 25 mm. 



Oviparous. Eggs thick-shelled, 0-()45-0-0;") x 0-035 mm., con- 

 taining well-developed emlu-yos. 



Text-figure 9, 



Diplotriana diuca, sp. n. 



Lateral view of anterior extremity of female. X 120. 



Lettering as in the preceding- text-figure. 



DiPLOTRIiENA DIUC^, Sp. n. 



This worm was obtained from the body-cavit}' of the Diuca 

 Finch, Diuca grisea; the material included both male and female 

 specimens. 



Specific diagnosis. — Diplotricena : Body comparatively short, 

 semi-transparent, tapering at both ends. The anterior extremity 

 is narrower than the posterioi'. 



Cuticle thin, transversely ringed. 



Cephalic extremity with six very inconspicuous, flattened 

 papilla?. 



Each oesophageal trideiit has a length of 0'13-0*14 mm.; its 

 anterior stem terminates in a fine point. CEsophagus 2*5-4 mm. 

 long, narrow throughout, and without division into anterior and 

 posterior regions. Tlie nerve-ring surrounds the cesophagus 

 0'2 ram. from the anterior extremity. 



