EXPLANATION OF PLATES 
All figures were drawn with a Zeiss compensating ocular no. 6 and a 1.5 mm. ob- 
jective at table level with the aid of a camera lucida and then enlarged two-and- 
a-half diameters. The figures on plates 1, 2, 3, and 8 were reduced one-third 
and those on plates 4, 5, 6, and 7 were reduced one-half. The figures on plates 1 
to 7 inclusive were made from slides of Taenia teniafermis and those on plate 8 
were made from slides of Moniezia. 
PLATE 1 
EXPLANATION OF FIGURES 
Early post synapsis spermatogonial cells. 
Anaphase of first spermatocyte division. 
Metaphase and anaphase of second spermatocyte division. 
Metaphase of second spermatocyte division. 
Late anaphase of second spermatocyte division; / and 2, a portion of chro- 
matin which lags behind the mass of chromatin. 
' F Late anaphase of second spermatocyte division; 1, a portion of chromatin 
which lags behind the mass of chromatin. 
HOOQWS 
