AUTHOR'S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, DECEMBER 27 
ON CERTAIN FEATURES OF SPERMATOGENESIS IN 
AMPHIBIA AND INSECTS 
ROBERT H. BOWEN 
Department of Zoology, Columbia University 
TWO PLATES (FORTY-SIX FIGURES) 
In a recent paper (Bowen, ’20) on insect spermatogenesis I was 
able to demonstrate a relationship between the acrosome and the 
Golgi apparatus, and from this and facts previously published by 
other workers, I suggested that ‘‘The acrosome of the animal 
sperm is probably universally formed in connection with the 
Golgi apparatus, and has nothing to do with spindle fibers or 
other cell parts.’? At that time the evidence from other groups 
was very scanty indeed, the work of Sjoevall, Schitz, Gatenby, 
and Duesberg on various molluscs and mammals furnishing 
almost the only indications of the correctness of this suggestion. 
On the other hand, there were several well-known cases in which 
the current descriptions seemed to present serious difficulties, if 
not a direct contradiction. | decided, therefore, to examine 
some of these cases more carefully, together with material from 
other groups in which the Golgi apparatus had not yet been 
studied. In working up the material, a number of unexpected 
features were brought to light and it seemed of value to look 
more carefully into some of the cytoplasmic constituents which 
had not been accurately followed heretofore. This, however, 
called for the collection of much more material and further experi- 
menting with fixation and staining—tasks which could not be 
immediately undertaken. I have accordingly decided to pub- 
lish the major facts relating to acrosome formation, together with 
certain other features of interest in the spermatogenesis of several 
Amphibia and Insecta, leaving the details for a later study. A 
review of technical methods and acknowledgment of much assist- 
ance in the collection and identification of material will be for 
the present postponed. 
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