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D. H. WENRICH 



able that Schaudinn's fluid causes shrinkage, and possibly Allen's 

 fluid may cause swelling. 



In making these measurements great care has been taken to 

 secure an unbiased selection of individuals for measurement. 

 Only individuals which appeared normal and had the axostyle 

 approximately straight were measured. All such individuals in 



Text figure A Vegetative individual of T. muris, partly diagrammatic; a, 

 blepharoplast; h, undulating membrane: c, caryosome; d, nucleus; e, inner row 

 of chromatic granules;/, parabasal body; g, outer row of chromatic granules; h, 

 chromatic basal rod; i, posterior flagellum as chromatic margin of undulating 

 membrane; j, axostyle; k, chromatic ring at point of emergence of axostyle; I, 

 cytostome; m, anterior free fiagella; n, posterior free flagellum. 



any one field of the microscope were measured. Successive 

 fields were treated the same way, duplication of fields being 

 prevented by the use of a mechanical stage. All measurements 

 were made by the aid of an eye-piece micrometer which had been 

 calibrated for the set of lenses used. The measurements obtained 

 agree very well in a general way with those of Kuczynski ('14) 

 and Kofoid and Swezy ('15). 



