FREE-LIVING NEMATODES 



70 (69) Spiculum single. 



71 



71(72) Vagina of the adult cylindroid, S-shapcd. . . Li mnomcrmis D.i&^y. 



72(71) Vagina tubular (?) not S-shaped P sc ud mc rm i s ^kM^n 



73 (68) Cuticula with criss-cross fibers. ... 



/4 



74(77) Vagina of the adult S-shaped 



75 (76) Spiculum single Paramermis von LinstoNv. 



76 (75) Spicula two Mermis Dujardin. 



77 (74) Vagina of the adult not S-shaped BaUiymcrmis Daday. 



78 (67) Longitudinal fields eight -g 



79(80) Cuticula without criss-cross fibers H ydromcrmis CorU. 



80 (79) Cuticula with criss-cross fibers Eiuncrmis Dadav. 



IMPORTANT REFERENCES ON FREE-LIVING NEMATODES 



Bastian, C. 1865. Monograph of the Anguillulidae. Trans. Linn. Soc, 



Lond., 25: 73-84; 5 pi. 

 BuTSCHLi, O. 1873. Beitrage zur Kenntnis der freilebenden Nematodcn. 



Nova acta caes. leop., 36: 144; 11 pi. 

 Cobb, N. A. 1913. New Nematode Genera Found Inhabiting Frc-sh- 



Water and Non-Brackish Soils. Jour. Wash. Acad. Sci., 3: 432-444. 

 1914. The North American Free-living Fresh-Water Nematodes. Trans. 



Amer. Micr. Soc, 2>i\ 69-134; 8 pi. 

 De Man, J. G. 1884. Die frei in der reinen Erdc und im susscn Wasser 



lebenden Nematoden d. Niederlandischen Fauna. 206 pp.; 34 pl- 

 Jagerskiold, L. a. 1909. Freilebende Siisswasserncmalodcn. Siisswasscr- 



fauna Deutschlands, Heft 15; 46 pp.; 65 figs. 

 Maupas, E. 1899. La mue et I'enkystement chez les Nematodes. Arch. 



zool. exper. (3), 7: 562-628; 3 pl. 

 1900. Modes et formes de reproduction des Nematodes. .\rch. zcx>I. 



exper. (3), 8: 462-624; ir pl. 

 MicoLETZKY, H. 19 13. Freilebende Susswassernematoden der O.^talpen 



Sitzber. Kais. Akad. Wiss. Wien, Math.-natunv. Kl., Abt. I, 122 : in 



122, 543-548. 

 Steiner, G. 1913-1914. Freilebende Nematoden aus der Schweiz. Anluv. 



Hydrobiol. und Planktonk., 9: 259-276, 420-438. 



