334 PRINCIPLES OF SOIL MICROBIOLOGY 



faecicola is the only member of the Trypanosomaceae found by 

 J as free-living in the soil. Spiromonas angusta was found by 

 A, E, G, J and Cunningham and Lohnis. Spongomonas is com- 

 mon in the soil (J), while Cladomonas was found in a Spitzbergen 

 soil by J. Tetramilus roslratus was found by J and M, T. spiralis 

 by C, J, L and M, T. pyriformis by J. F and K also recorded the 

 presence of species of Tetramitus in the soil. Hexamitus inflatus 

 was found by F, Spironema multiciliatum by C and J. 



III. Chrysomonadinae. Small flagellates; when not possessing chroma- 

 tophores, resemble the Protomastiginae. Cuticle generally 

 present, but is thin and does not prevent them from becoming 

 amoeboid; 1 or 2 flagella. Cysts endogenous, wall being more or 

 less impregnated with silica. This group includes the following 

 forms found in the soil: Oicomonas termo (D, F, G, J, K), 0. 

 granulata (K), Chrysamoeba radians (I), Mallomonas (E), Monas 

 guttula (A, E, F, J, K, N, Koch, Cunningham and Lohnis), M. 

 vivipara (E, F, N), C ephalothamnion cyclopum (J), Physomonas 

 elongata (F), Polypseudopodius bacterioides (D). 



IV. Cryptomonadinae. Small forms, with two flagella, usually equal, 

 arising behind the anterior end in a hollow which is usually the 

 opening of a funnel running deep into the interior of the cell. 

 Egg-shaped and more or less flattened; body enclosed in mem- 

 brane and not amoeboid. One or two simple contractile vacuoles 

 at anterior end. These include Chilomonas paramoecium (A, 

 F, I, J, K), Cryptomonas (F, J, K), Cyathomonas truncata (Cun- 

 ningham and Lohnis), Rhodomonas (I). 

 V. Euglinidae, characterized by a complicated vacuole system situated 

 at anterior end and consisting of one or more accessory vacuoles 

 which, in contracting, empty their contents into a large main 

 vacuole or reservoir, which communicates with the cytopharynx. 

 Mostly with green chromatophores, enclosed in a membrane and 

 with 1 or 2 flagella. Euglcna acus was found in the soil by F and 

 K, E. deses, E. oxyuris and E. spirogyra by I, E. vclata by B, E. 

 viridis by A, E, F, I, N, Eutreptia viridis by F, Phacus longicauda 

 by F and I, Ph. pyrum by F and K, Trachelomonas volvocina and 

 Cryptoglcna pigra by F. Species of Astasia were found in the 

 soil by D, F, N. Distigma (Astasia) proteus by B andK. Clos- 

 tenema (S phenomonas) socialis by F, Menoidium by J, Petalomonas 

 angusta by J, P. mediocanellata by B and F, P. pleurosigma by I, 

 Scytomonas pusilla by D, L and J, Peranema trichorophorum by 

 B, F, I, K, Urceolus cyclostomus by K, Anisonema minus by J, 

 Enlosiphon sulcatum by C, I and J, Hcleronema acus by FandN. 

 VI. Phytomonadinae. Solitary or in colonies, enclosed in a cellulose 

 wall; chlorophyll and stigma nearly always present; 1 or more 

 simple contractile vacuoles at anterior end. Chlamydomonas sp. 

 was found commonly in the soil by A, E, F, K, Polytoma uvella 

 by A, K and J, Chlorogonium eucMorum by J and K, Pandorina 

 morum by A. 



