3IO J. E. WODSEDALEK. 



body, or whether they originate separately. In only three cases 

 did I observe two bodies apparently of equal size and smaller 

 than the profoundly constant chromatoid body (Fig. 54). Were 

 such cases more numerous one might assume that such bodies 

 are the components of the chromatoid body, but since such bodies 

 are of such extremely rare occurrence no definite statement can 

 be made in regard to them. 



When the primary spermatocyte divides the chromatoid body 

 is practically always found in only one of the resulting cells (Figs. 

 3033) and in a large majority of the cases it is found in the 

 cells which do not contain the accessory chromosome (Figs. 30, 

 31 and 33). This, however, is not universal, for in some cases 

 at least, it is found in the same cell which contains the accessory 

 (Figs. 32 and 35) ; and it has also been seen in the division stages 

 of such a type of secondary spermatocyte (Figs. 38 and 39) as 

 well as in the spermatid resulting from such a division (Fig. 41). 

 In the anaphase of the secondary spermatocyte division the body 

 is usually seen lagging on the spindle threads behind the masses 

 of chromosomes (Figs. 39, 48, 49, 51 and 52); occasionally, 

 however, it is seen at the pole (Fig. 51). After the division is 

 complete the body usually lies far out in the cytoplasm (Figs. 

 41 and 57), and in rare cases only, is it seen in close contact 

 with the nucleus. Figure 58 represents an extreme case of that 

 nature, and it appears that such a condition is brought about 

 when the chromatoid body bears a relation to the chromosome 

 as is represented in Fig. 51. Sometimes two bodies (Fig. 60), 

 though not always of the same size, appear in the spermatid. 



In the late resting stages of the spermatid the body may again 

 be found anywhere in the cytoplasm (Figs. 62-67), a t times near 

 the nucleus (Fig. 62). Sometimes it is found in close contact 

 with the centrosome (Figs. 63 and 66) and in only rare cases it 

 is found on the axial filament, giving the impression that it is 

 fused or in close contact with the posterior centrosome (Figs. 

 72 and 76). Later, however, it leaves the filament and lies 

 freely in the cytoplasm (Figs. 74, 75, 77, 86). In the final stages 

 of the developing spermatozoon when the cytoplasmic mass is 

 cast off, the chromatoid body when present is invariably thrown 

 off with it (Figs. 82 and 86). It is certain that the chromatoid 



