— 110 — 



The convolutions of the uterus extend not only behind 

 the ovary, but also to the sides of the latter, and even in 

 the part of the body anterior to the ventral sucker there is 

 a rather complicated portion of the loops of the uterus, which 

 lie, however, only medially, and do not extend beyond the 

 lateral margins of the intestinal trunks, as is the case in 

 Prosthogonimus ovatus (Rud. 1803). 



The numerous small ova filling the uterus have the fol- 

 lowing dimensions: 0,029-0,081 mm. in length by 0,0174 mm. 

 in width. 



F. Fam. Echinostomldae Dietz. 



In the material investigated by me there were 3 repre- 

 sentatives of this family, belonging to the genera: Echinopa- 

 r yphimn D\eiz 1909, Nephrostomum Dietz 1909 and Me- 

 sorchis Dietz 1909. 



VI. Genus Echinoparyphium Dietz. 1909, 

 6. Echinoparyphium volvulus Odhner 1911. 



(Fig. A.). 



The specimens studied by me were taken from the intes- 

 tine of the black Ibis. 



The number of spines on the collar = 33. In one speci- 

 men there were only 29 spines. 



VII. Gen. Mephrostomum Dietz 1909. 



7. Nephrostomum ramosum (Sonsino 1895.) 



(Fig. B). 



This parasite present in the collection of Prof. Dogiel 

 and Sokolov was taken from the intestine of a gray Heron — 

 Arclea sp. 



An interesting peculiarity in the specimens investigated 

 by me is presented by 51 spines on the cephalic collar of 

 the parasite. In his work Sonsino numbers 46 spines on 

 the collar of Eclmiostomum ramosum described by him. 

 Odhner found 47 — 49 spines in his specimens; and, lastly, 

 Dietz considers the number of spines in this parasite to 

 be 48. 



