— 149 — 



uital aperture reaches 0,34 mm., in the region of the anus — 

 0,17 mm. The oesophagus is cylindrical, without any bulb, 

 5.1 mm. long, and 0,09 mm. wide. The chitinous trident 

 near the initial part of the oesophagus reaches 0,19—0,2 mm. 

 in length, the manubrium being=0,05 mm. The caudal ex- 

 tremity is rounded, the anal aperture lies at a distance of 

 0,068 mm. from the caudal end. As concerns the genital aper- 

 ture, it is situated in the anterior part of the body, at a dis- 

 tance of 0,51 — 0,54 mm. from the cephalic end. The terminal 

 portion of the vagina has the character of a muscular for- 

 mation reaching 0,17 mm. in width. The genital glands extend 

 to the level of the opening of vulva in the anterior part of 

 the body, whereas in the posterior part the spirally twisted 

 glands are at a distance of 0,55 mm. from the caudal extre- 

 mity. The eggs reach 0,055 mm. in length, and 0,037 mm. 

 in width, and contain developed embryos twisted spirally, or 

 into a ring. 



25. Diplotriaena ozouxi Raill. et Henry 1909. 



This species was described only once till the present by 

 Railliet et Henry from the ventral cavity of Faudias madagas- 

 cariensis (B r i s s o n) — a bird of the fam. Ploceidae. In 

 the collection investigated there were 2 females from a bird 

 not yet determined — M 7 (from fam. Ploceidae). 



G. Fam. Angiostomidae. 



From this family there was only one species representing 

 the genus Angiostomum Duj. 1845 in the material investi- 

 gated. 



XIII. Genus Angiostomum Dujardin 1845. 



Out of the 9 species described until present, 1 species is 

 described from birds i), 4 species from reptiles and 4 species 



1) Lin stow. Helmintholog. Untersuchnngen; Arch, fiir Natnrgesch. 

 1880. Ig. 46, p. 46 — 47, Fig. 11: Angiostomum sangninolenta u. sp. from 

 the thoracal and ventral cavities of Strix flammea. 



This species, however, does not seem to belong to this genus! 



22 



