No. 3.] ORIGIN OF THE CLEAVAGE CENTROSOMES. 813 
similar; and also inconstant, large and small granules (or bodies) 
found outside and sometimes within the first and second matu- 
ration spindles (Fig. 4), outside and sometimes within the 
attraction spheres (Figs. 3, 4, 9, 10), and, again, often scattered 
throughout the cytoplasm? Furthermore, as no exact distinc- 
tion can be made as to size, how do these bodies differ from 
the microsomes? (Figs. 2, 3, 4, 7,9, 10.) Can these sperm 
granules and large granules throughout the cytoplasm — 
apparently indicative of incipient degeneration — be at first 
merely an expression of abnormal activity in the cell? These 
questions must be left to the more experienced student to 
answer. 
I am greatly indebted to Dr. Whitman for criticism of my 
work, and for other courtesies in connection with this paper. 
