— 100 — 



face of the body, but on its right lateral edge, — a peculiari- 

 ty which distinguishes this form from all other Trematodes 

 known until now. It is also interesting to mention the affi- 

 nity of this parasite with the genera of fam. Allocreadiidae 

 which, with only one exception, are found in the intestine 

 of fishes. 



Mesocoelmm sokolowi n. sp. (also from the intestine 

 of a chamaeleo) is noteworthy in its being the second 

 species of the genus Mesocoelmm Odhner 1911 (from 

 fam. Dicrocoeliidae), to which until recently only one pa- 

 rasite — Mesocoelmm sociale (Liihe 1901) from Amphibia has 

 been referred. 



Prosthogonwuis dogieli n. sp. was found in the biu'sa 

 Fabricii of the common swallow {Hirundo rustica) and, there- 

 fore, does not present a specific parasite of the African 

 continent; this species will probably be discovered in due 

 time in Europe as well. 



The discovery of the parasite Ganeo glottoicles Klein 

 1905 var. africana nova var. (from the intestine of a re- 

 presentative of Ranidae) in Africa is a very interesting fact, 

 as this species had been- described only once until now in 

 Bana hexadactyla from India. 



And lastly, the species Nephrostomum ramosum (Sonsino 

 1895) (from the intestine of Ardea sp.) is interesting on 

 account of the presence of 51 spines on the cephalic col- 

 lar, the preceding authors having stated 46 — 49 spines (Son- 

 sino, Dietz, Odhner). This fact is remarkable, as it proves 

 the variation of the number of spines on the collar of Echi- 

 nostomidae in the limits of one species, whereas most hel- 

 minthologists consider the number of these spines a reliable 

 criterion for distinguishing the species from each other. 



I deeply regret my inability to give in the present paper 

 the scientific nominations of some of the hosts of the parasi- 

 tes described, namely, of those the skins and conserved pre- 

 parations of which had to be left on the African territory, 

 on account of military complications. In future, when the 

 hosts of the parasites are accurately determined, I shall ma- 

 ke a corresponding supplement to the present work 



The arangement of the Trematodes from the col- 

 lection of Prof. Dogiel and Sokolov in the zoolo- 

 gical system. 



I 



