— 144 — 



js 0,42 mm., at a width of 0,14 mm. The oesophageal bulb is 

 0,12 mm. long, and nearly as wide as the anterior part. The 

 caudal end is provided with a pointed appendix which rea- 

 ches 0,05 mm. in length. The length of the tail (from the poste- 

 rior extremity of the body to the anus) =- 0,153 mm. Two 

 bent spicula of equal size with a pointed free end. The length 

 of spicula, when stretched out, — 0,4 — 0,41 mm. 9 pairs of 

 preanal papillae. They are arranged in the following way: 

 the first and second papillae are close to each other; at some 

 distance from them is situated a group composed of the 3-rd, 

 4-th and 5— th papillae, wiiich are at the same distance from 

 each other. Further are situated papillae 6, 7, 8 and 9, also 

 at equal intervals from each other. 



There are 6 pairs of postanal papillae; they are arranged 

 symmetrically in the following way: l, 3 and 5 papillae are 

 displaced nearer to the medial body-line, whereas the 2, 4 

 and 6 papillae lie more peripherally. Gubernaculum is absent. 



The female. General body-length — 5,1 mm., at a ma- 

 ximum width 0,255 mm. in the region of the uterus. The 

 length of the whole oesophagus —0,476 mm. at a width — 

 0,17 mm. Oesophageal bulb 0,15 mm. long, 0,17 mm. wide. 

 The caudal end is straight, provided, as in the male, by a 

 pointed outgrowth. The anal aperture is situated at a distance 

 of 0,18 .mm. from the caudal extremity. The width of the 

 body in the region of the oesophageal bulb reaches 0,2 — 0,22 mm., 

 in the region of the genital aperture — 0,24 mm. and, lastly, 

 in the region of the anus — 0,12 mm. The genital aperture is 

 in the form of a minute transverse slit limited by 2 lips. 

 The genital aperture is situated in the posterior half of the 

 body, at a distance of 2 mm. from the caudal extremity. The 

 genital glands occupy the .middle third of the body without 

 extending far both anteriorly,' and posteriorly. The eggs are 

 very large, of a round-oval shape, 0,102 mm. long, and 

 0,08 mm. wide. The number of eggs is very small: in the 

 female investigated there were only 22 eggs in different stages 

 of cleavage. 



E. Fam. Physalopteridae Leiper 1911. 



In the collection there are 2 representatives of this family 

 belonging to the genus Physahptera Kud. 1819. 



