124 \<]. A. MINCJIIN AND H. M. WOODOOCK. 



wide individuals show little or no indications of this substance 

 (figs. 22, 2S), but in others the condition is present to a 

 greater or less degree (figs. 24, 25). It is never so prominent 

 as it frequently is in the slender type of form. It is some- 

 what remarkable that neitlier iion-hiematoxylin nor Twort 

 show anything at all corres])onding to this appearance so far 

 as can be seen. After Twort's stain the body of the large 

 form either appears finely granular and faintly tinted gi-een 

 (fig. 62) or else it is very pale, scarcely, if at all, stained (fig. 

 01).^ Yet it is quite evident that there must be something 

 more than merely the ordinaiy cytoplasm present to account 

 for the appearance seen after Giemsa. 



We are inclined to doubt whether the characteristic granules 

 above described occur so frequently in these large forms as 

 they do in the small ones. They are not visible, for instance, 

 in either fig. 50, of a slender individual, or in fig. 48 of a 

 broad one. One granule is seen in the stout form of fig. 49, 

 however, and a couple in that drawn in fig. 25. Also in 

 the slender parasite in fig. 4 there are a couple, but this is 

 the only full-sized individual of this t^'pe in which we have 

 made them out with certaint\'. Fig. 45 represents a slender 

 form of intermediate size, and this shows a single prominent 

 granule. 



Nearly all the individuals of the slender and broad types 

 appear to be full grown. We have been able to find, however, 

 two or three examples of what are undoubtedly young, 

 growing individuals of these forms. They occur in slides of 

 the series containing many of the large forms. Two young 

 parasites of the slender type are seen in figs. 12, 13; and a 

 young individual which would probably have developed into 

 a stout form is drawn in fig. 14. One of the slender forms 

 shows very conspicuously the two characteristic granules; 

 and in the small broad individual we think it not at all 



' The shading, often irregular, of the iron-h£eiuatoxylin parasites in 

 figs. 45 and 49, for instance, is meant to indicate the slightly vaiying 

 thickness of the densely stained cytoplasm of the corpuscle lying over 

 the parasite. 



