ECOLOGY, COMMENSALISM AND PARASITISM 355 



cyclostomum, Stein (Fantham and Paterson, 1923-1924); and Hetero- 

 nema acus, Stein (Fellers and Allison, 1920). 



Flagellates of the Soil from 28 Stations in All Parts of the World, 

 in the Order of Frequency, Condensed from Sandon, 1927. 



Per cent. 



1. Heteromita globosa, Stein found in 143 soils, or 98.0 



2. Cercomonas species found in 99 soils, or 67 . 8 



3. Oikomonas termo, Elirbg found in 93 soils, or 64 . 3 



4. Allantion mikroteron, Sandon .... found in 72 soils, or 50.0 



5. Phalansterium solitarium, Sandon found in 56 soils, or 38.3 



6. Tetramitus spiralis, Goodey .... found in 37 soils, or 25 . 3 



7. Spongomonas sp found in 34 soils, or 23 . 1 



8. Sainouron mikroteron, Sandon . . found in 32 soils, or 22 . 



9. Cercomonas crassicauda, Alexeieff . found in 31 soils, or 21 .0 



10. Cercobodo vibrans, Sandon .... found in 27 soils, or 19.0 



11. Helkesimastix foecicola, W. and Lap. . found in 23 soils, or 16.0 



12. Alias diplophysa, Sandon found in 21 soils, or 14.0 



13. Anisonema minus, Sandon found in 17 soils, or 12.0 



14. Proleptomonas foecicola, Woodcock found in 15 soils, or 10.0 



15. Spiromonas angusta, Dujardin . . found in 13 soils, or 9.0 



16. Scytomonas pusilla, Stein found in 12 soils, or 8.0 



17. Actinomonas mirabilis, Kent .... found in 11 soils, or 8.0 



18. Mastigella sp found in 10 soils, or 7.0 



19. Heteromita sp. . ■ found in 8 soils, or 6.0 



20. Cercobodo agilis, Moron' found in 6 soils, or 4.0 



21. Tetramitus rostratus, Perty .... found in 6 soils, or 4.0 



22. Monas sp found in 6 soils, or 4.0 



23. Petalomonas angusta, Klebs . found in 6 soils, or 4.0 



24. Entosiphon sulcatum, Dujardin found in 6 soils, or 4.0 



25. Monosiga ovata, Kent found in 5 soils, or 3.0 



26. Phyllomitus amylophagus, Klebs . found in 5 soils, or 3.0 



27. Phyllomitus undulans, Stein .... found in 5 soils, or 3.0 



28. Petalomonas sp found in 5 soils, or 3.0 



29. Bodo celer, Klebs found in 4 soils, or 3.0 



30. Bodo saltans, Ehr found in 4 soils, or 3.0 



31. Colponema symmetrica, Sandon found in 4 soils, or 3.0 



32. Heteromita obovata, Lemmermann found in 4 soils, or 3.0 



33. Cephalothamnion cycloum, Stein . found in 4 soils, or 3.0 



34. Polytoma sp Less than 3.0 



35. Mastigamoeba limax, Moron" Less than 3 . 



36. Heteromita ovata, Dujardin Less than 3.0 



37. Menoidium sp Less than 3.0 



38. Chlorogonium sp Less than 3.0 



39. Bodo caudatus, Dujardin Less than 1 . 



40. Bodo edax, Klebs Less than 1 . 



41. Heteromita compressa, Lemmermann Less than 1.0 



42. Phyllomitus sp Less than 1.0 



43. Cladomonas fruticosa, Stein . Less than 1.0 



44. Tetramitus pyriformis, Klebs Less than 1 . 



45. Spironema multiciliata, Klebs Less than 1.0 



46. Chilomonas sp Less than 1.0 



47. Cryptomonas Less than 1 . 



48. Petalomonas mediocanellata, Stein Less than 1.0 



