— 153 — ^ 



caudal extremity. At some distance from tlie ceplialic extre- 

 mity (ill tlie male at a distance of 0,85 mm., in the female — 

 0,952 mm.) are situated very peculiar neck papillae composed 

 of a basal portion, which has the form of a cuff, from the 

 middle of which projects a flagellate outgrowth pointed at 

 the tip. The length of this flagellate outgrowth reaches 0,051 mm. 

 (in the male) and 0,068 mm. (in the female). 



The male reaches 19,0 mm. in length, at a width = 0,935 mm. 

 in middle portion of the body. In the region of the posterior 

 end of the oesophagus the width of the body reaches 0,52 mm., 

 in the region of the cloaca ^ 0,595 mm. The length, of the 

 two equal spicula is 2,72 mm., the width of the base being 

 0,119 mm. The form of the spicula is very peculiar: the cent- 

 ral portion of the spicula bears on either side transversely 

 striated alae, whilst the posterior portion of the spicula is 

 spirally coiled. The posterior end of the spicula is spade-sha- 

 ped, the lateral alae being arranged on them asy metrically, 

 as it is seen in fig. 82. Gubernaculum is absent. Cloaca is 

 situated at a distance of 0,32 mm. from the posterior end of 

 the body. 



The caudal extremity of the male is provided with a bursa 

 composed of 3 lobes and bearing a complex of peculiarly 

 arranged ribs, the exact aspect of which is given by me in 

 fig. 80 made with the help of Abbe's camera lucida. The la- 

 teral lobes of the bursa are divided from the elongated middle 

 one by a small groove. The costae posteriores are composed 

 of a median trunk bifurcated at the end, to the anterior part 

 of which are adjacent on the sides 2 shorter ribs (one on 

 each side). Each of the lateral lobes is supported by 7 ribs 

 grouped into 4 parts: costa posterior externa is single, three 

 costae mediae commence by a common trunk, costae ante- 

 riores are double, and lastly the 4 — th group consists of the 

 single costa anterior externa. The nerve-ring in the male is 

 situated at a distance of 0,2 mm. from the cephalic end. 



The female: 21,0 mm. long, at a maximum width = 

 1,12 mm., in the middle portion of the body. In the region 

 of the posterior portion of the oesophagus the width of the 

 body reaches 0,612 mm., in the region of the nerve-ring = 

 0,476 mm., on the level of the excretory pore = 0,68 mm., 

 on the level of the genital aperture = 0,51 mm., in the re- 

 gion of the anus = 0,37 mm. 



