Explanation of Plates. 
Zeiss’ Microscope was used. 
Figs. PI. II. 
1. Rhabditis marina, Bastian, tf: tail in profile. Apochr. 8 mm, Comp. 8, 
2. Rhabditis marina, Bastian, c?; tail from the dorsum. Apochr. 8 mm. 
Comp. 8. 
o. Rhabditis marina, Bastian, tf; spicules. Homog. Imm. 1 Ii 2 Oc. 2. 
4. Rhabditis marina, Bastian, 9; female organs. Apochr. 8 mm, Comp. 4. 
5. Rhabditis marina, Bastian, 9; front part. Apochr. 8 mm, Comp. 8. 
6. Mononchus dolichurus, n. sp. 9; front part. Apochr. 8 mm. Comp. 8. 
7. Rhabditis marina, Bastian, 9; tail. Obj. E, Oc. 2. 
8. Oncholaimus oxyuris, n. sp. 9; female organs. Apochr. 8 mm, Comp. 4. 
9. Oncholaimus oxyuris, n. sp. tf; tail. Apochr. 8 mm, Comp. 8. 
10. Mononchus dolichurus, n. sp. 9; tail. Apochr. 8 mm, Comp. 4. 
11. Mononchus dolichurus, n. sp. 9; limit between the oesophagus and 
the intestine. Apochr. 8 mm, Comp. 4. 
12. Oncholaimus oxyuris, n. sp. 9; head. Obj. E. Oc. 2. 
13. Oncholaimus oxyuris, n. sp. 9; tail. Apoclir. 8 mm, Domp. 8. 
PI. III. 
14. Monohystera crassissima, n. sp. 9; hind part of the animal. Apochr. 
8 mm, Comp. 4. 
15. Monohystera crassissima, n. sp., tf; spicules. Homog. Imm. 0 12 Oc. 2- 
10. Trilobus gracilis, Bastian, 9; tail with masculine papillæ. Apochr. 
8 mm, Comp. 4. 
17. Mononchus spectabilis n. sp., 9; head. Apochr. 3 mm, Comp. 4. 
18. Prismatolaimus dolichurus, de Man. Limit between the oesophagus 
and the intestine. After a sketch in my notes. 
19. Mononchus spectabilis, n. sp., tf; tail. Apochr. 8 mm, Comp. 8. 
20. Trilobus gracilis, Bastian, 9; the female organs from the specimen in 
whicli are found preanal masculine papillæ. Apochr. 8 mm, Comp. 4. 
21. Cjlindrolaimus tristis n. sp., 9; head. Apochr. 3 mm, Comp.4. 
22. Monohystera crassissima n. sp., 9; head. Homog. Imm. 1 h 2 Oc. 2. 
23. Cylindrolaimus tristis, n. sp., 9; tail. Apochr. 8 mm, Comp. 8. 
24. Dorylaimus doryuris, n. sp., 9: head. Apochr. Homog. Imm. 2 mm 
Comp. 4. 5 
25. Dorylaimus eurydorys, n. sp., 9; head. Apochr. 8 mm, Comp. 8. 
