394 



GARY N. CALKINS AND RACHEL C. BOWLING. 



Sfe, 



ii-vA 



- ffS 



eKpaBs^K^^ 



i* ' "-i.^. L--.-iiiL-V- 



""'.'. ; . '. .; . ; . -..t'C ;?"*' V ';' 



,^'7-- > -**V!& -,/pj . .fVT"--^**| 



FIG. 8. Anaphase stage of last pregametic division and 3 groups of chromo- 

 somes from other spindles in the same stage. Sections. Camera lucida. X 2650. 



marked as in the case of Aggregate, or as in Mulsow's Monocystis 

 rostrata. 



The gametes are relatively large, spherical to ovoidal in shape 

 and without constant dimorphism although minor variations in 



FIG. 9. Characteristic grouping of gametes around periphery of gamont. 

 Section. Camera lucida. X 600. 



size may be observed even in gametes from the same gamont 

 (Fig. 9). The nuclei are usually near the anterior end of the cell 



