496 FOOT. [Vou. XIV. 
number is very small as compared to the masses in the slime- 
tube and spermathecae, and for that reason IJ at first (errone- 
ously) interpreted them as retarded individuals. I have since 
found that the head and tail of those in the fertilized egg 
respond to differential staining. 
As many as nine spermatozoa have been found in one egg ; 
but in such cases they do not all have an attraction-sphere. It 
A 
B 
Fic. 1.— A, hypertrophied spermatozoén; B&, normal spermatozoén. 
Camera. X about 687. 
appears as though the cytoplasm of the egg finally responded 
no longer to the stimulus. In many cases the tails can be 
identified within the fertilization cone. In two cases two 
spermatozoa are in the same cone without producing any 
apparent disturbance in its form. 
SPERMATHECAE. 
Authors agree in ascribing to the spermathecae the function 
of collecting the seminal fluid during copulation and storing it 
until it is needed for the cocoon, which has been supposed to 
