— 151 — 



in the region of the genital aperture — 0,986 mm., on the le- 

 vel of the anus 0,17 mm. 



Besides the mature forms of parasitic Nematodes described 

 above, there were several larvae in the material taken by 

 prof. Dogiel and Sokolov belonging to the provisional genus — 

 Agamospirurn Raill., Henry et Sis off 1912. 



XIV. Genus Agamospirura Ralll. Henry et Sisoff 1912. 



1) From a fish of fam. Cyprinidae (freely in the inte- 

 stine). 



2) From a fish of fam. Siluridae (fish No. 8) — in cysts. 



3) From bird No. 15 {Larus sp.) — in cysts on the walls of 

 the intestine. 



Supplement. 



Amongst the collections of the Museum of the Imp. Aca- 

 demy of Sciences at Petrograd there is a test-tube with 

 Nematodes from the stomach of 2 rhifioceros killed on the 

 26— th and 28 — th of January 1912 by Svatosh on the bank 

 of river Tana (Kiluluma). 



The investigation of the specimens proved that they were 

 the same parasites which had been described in 1907 by 

 Linstow under the name of Delefrocephahis stylosiis n. sp. 

 from Rhinoceros africanus out of German East Africa. 



However, a detailed study of these parasites in connection 

 with a perusal of the literature on the genus Dehtroceplmliis 

 Dies. 1861 showed quite clearly and definitely that Deletro- 

 cephalus stylosus Linstow 1907 from rhinoceros ought not 

 to be referred, as it was erroneosly done by Linstow, to the 

 genus Deletrocephaliis Dies., as it has absolutely no common 

 generic characters with the type of this genus — Deletroce- 

 _plialus dimidiatus Dies. The genus Deletrocephalus is a typi- 

 cal representative of the birds' Strongylidae, containing the 

 only species D. dimidiatus Dies, from the intestine of Rhea 

 americana, described both by Diesing, and recently by Schnei- 

 der. The parasite which stands in the literature under the 

 name Deletrocephalus stylosus Linst. 1907, must without 

 doubt be regarded as a type belonging to a special new ge- 

 nus which I propose to name Kiluluma n. gen. (name of the 

 locality where the parasite was discovered). 



22* 



