— 108 — 



ill diameter. The oesophagus is altogether absent. The inte- 

 stinal trunks reach the end of the body. The testes are arran- 

 ged on both sides of the ventral sucker, somewhat posteriorly 

 to it, and projecting with their lateral margins beyond those 

 of the intestinal trunks. The shape of the testes is irregular 

 oval and slightly lobed. The spirally coiled bursa cirri is si- 

 tuated in the space between the pharynx and the ventral 

 sucker, being localized dorsally to the latter with its poste- 

 rior edge. I could not study the structure of this organ in 

 detail on account of the limited quantity of material at ni}'' 

 disposal. The ovary is of an irregular round shape, conside- 

 rably smaller than the testes, and situated on the left side 

 of the parasite adjoining to the posterior part of the interior - 

 edge of the left testis. The vitelline glands begin at the level 

 of the posterior edge of the testes and reach the border of 

 the third and hinder quarters of the body length. The vitel- 

 line glands are arranged not only on the sides of the intesti- 

 nal trunks, but also dorsally to them, the main vitelline ducts 

 fusing together in the median line at about the level of the 

 middle of the body-length. The uterus is localized on the 

 limit between the testes and the posterior end of the body. 

 The convolutions of the uterus are arranged not only in the 

 space between the intestinal trunks, but some portions of it 

 cross the intestine and nearly reach the lateral edges of the 

 body. The uterus is filled with eggs which are 0,032 mm. 

 in length, and 0,019 mm. in width. 



The genital aperture is situated medially, anteriorly to the 

 ventral sucker. 



E. Fam. Lepodermatidae Odhner. 



V Gen. Prosthogonimus Liihe 1899. 



5. Prosthogonimus dogieli spec. nova. 



(Tab. I, fig. 4). 



Host: Hirunclo rustica. 



Occurence: bursa Fabricii. 



Length of the body=4,75 mm., width=3,65 mm.; this cha- 

 racter alone places our parasite in a distinct position among 

 the other species of the genus Prostliogonimus, as in the 

 latter the width of the body forms a half of its length. 



The surface of the cuticle is covered with spines pointed 



