PLATE 2 
EXPLANATION OF FIGURES 
Figures 27 to 40 are from Lixus concavus; figures 41 to 46 are from Ceutho- 
philus maculatus. 
27 Spermatocyte (or late spermatogonium). (Modified Kopsch.) 
28 to 30 Spermatids. Successive stages in the fusion of Golgi bodies to form 
the acroblast. (Modified Kopsch.) 
31 Spermatid. (Modified Kopsch.) 
32 Cross-section of slightly elongated nebenkern. (Benda.) 
33 Cross-sections of the nebenkern at approximately the stage of figure 34. 
A, through the chromophilic substance; B, above (or below) the chromophilic 
substance. (Benda.) 
34 and 35 Spermatids, just prior to, and at the time of, disappearance of 
the chromophilic substance. (Flemming-hematoxylin.) 
36 to38 Late spermatids. Casting off of the acroblast. (Benda.) 
39 Latespermatid. Golgi remnant passing backward along the tail. (Modi- 
fied Kopsch.) 
40 Spermatid, showing acrosome in final position. (Benda.) 
41 Early spermatid. (Modified Kopsch.) 
42 and 43. Spermatids. Development of the acrosome. (Flemming without 
acetic-hematoxylin.) 
44 Spermatid. Fixation of the acrosome. (Benda.) 
45 Spermatid. Casting off of the acroblast. (Benda.) 
46 Spermatid. Backward migration of the Golgi remnant and the juxta- 
nuclear body. (Flemming without acetic-hematoxylin.) 
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