— 113 — 



this old genus which is hardly at all mentioned by modern 

 helmintliologists. 



The study of the literature on the genus Oxysoma 

 Schneider 1866 made me re-group some of its representatives 

 referring them to other genera of Nematodes, and, on the con- 

 trary, include into the genus Oxysoma one of those para- 

 sites which was classified iji literature as a representative of 

 ({uite a different genus. 



I paid much attention to drawings which often characte- 

 rize certain species much clearer than the most detailed des- 

 cription of them. 



I consider it necessary — before beginning the description 

 of the separate representatives of Nematodes from the colle- 

 ction of Dogiel and Sokolov — to give the following tables: 1) 

 table of their arrangement in the zoological system and 2) 

 table of their arrangement according to the hosts. 



Arrangement of the Parasitic Nematodes from the collection of Prof. 

 Dogiel and Sokolov in the Zoological System. 



A. Fam. Strongylidae Cobbold 1864 (s. lato). 



I. G e n. Ampliibiopliilus gen. no v. 



1. Ampliihiophilus acanthocirratics n. sp. 

 II. G e n. Diaphmiocephaliis D i e z. 



2. DiaphanocepUaliis costatus (Rud 1819) 



B. Fam. Ascaridae Cobbold 1864. 



III. Gen. Ascaris Linne 1758 (s. lato). 



3. Ascaris euxina Linst. 1903. 



4. Ascaris filaria Dujard. 1845. 



5. Ascaris zebrae nov. spec. 



6. Ascaris sp. 



7. Ascaris sp. 



IV. Gen. Tripiculascaris gen. nov. 



8. Trispiculascaris helicina (Molin 1860) 

 V. Gen. Orneoascaris gen. nov. 



9. Orneoascaris chrysanthemoides spec. nov. 



C. Fam. Heterakidae Rail!, at Henry 1914. 



VI. Gen. Subulura M o 1 i n 1 8 6 

 10. Subulura suctoria Molin 1860. 



