PLATE 3 
EXPLANATION OF FIGURES 
10 A spermatophore from the body fluid of A. cristata. These cells are the 
sixth generation of spermatogonia from the primary spermatogonia. Each divides 
to form the last spermatogonial generation. The cells have an average diameter 
of 3.5u. All are in the equatorial plate stage. xX 340. 
11 A spermatophore from the body fluid of A. cristata. The cells are the sper- 
matids Just after the division of the spermatocytes of the second division. They 
are in the early anaphase. X 340. 
12 A mature spermatophore of A. cristata. Smear preparation fixed in 
vom Rath’s fluid and stained in saureviolett and iron haematoxylin. X 625. 
18 Body fluid of A. cristata under low power, showing spermatophores in various 
stages (a, b, ce), and coelomic cells (d), leucocytes and chloragogue cells. > 100. 
14 A phagocyte from testis of A. cristata in April. xX 930. Note the ingested 
cell. 
15 An early stage in the formation of a spermatophore, from the body fluid 
of A. cristata. Diameter of the spermatophore 32 «4; average diameter of the cells 
An 
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1048 
