HOLOTRICHA 



761 



left margin; undulating membrane on right and 3 membranellae on 

 left of mouth; 5 postoral ciliary meridians; macronucleus ovoid; a 

 micronucleus; fresh water. 



L. patula E. (Fig. 324, d-f). Broadly pyriform; 80-160/x long; 

 occasionally small forms occur; cytostome pyriform, about 1/3 

 the body length; 40-45 ciliary meridians; macronucleus irregularly 

 ovoid; a micronucleus attached to macronucleus; carnivorous, but 

 may be cultured in sterile media (Kidder) ; fresh water. Morphogene- 

 sis (Faur6-Fremiet, 1948). 



Genus Glaucoma Ehrenberg (Dallasia Stokes). Ovoid or ellipsoid; 

 cytostome about one-fourth the body length, near anterior end, 

 ellipsoid; cytostome with an inconspicuous undulating membrane 



Fig. 324. a-c, Tetrahymena pyriformis (a, X535 (Kidder); b, c, cyto- 

 stomal structure (Furgason)); d-f, Leucophrys patula (d, a well-fed ani- 

 mal, X280 (Maupas); e, a diagram, X535 (Kidder); f, cytostome (Furga- 

 son)); g, h, Glaucoma scintillans (g, a diagram, X535 (Kidder); h, cyto- 

 stome (Furgason)); i, j, Colpidium colpoda (i, X180 (Kahl); j, cytostome 

 (Furgason)) ; k, C. campylum, X535 (Kidder) ; 1, C. echini, X385 (Powers) ; 

 m, Paraglaucoma rostrata, X400 (Kahl); n, Malacophrys rotans, X500 

 (Kahl). 



