252 EIYOSHI MASUI. 



PLATE IX. 



All figures are from rabbit. 



Fig. If 3 105. Spermatocytes iu prophase, showing longiturlinal splittings of chromosomes. 



Figs. 106, 107. Side views of metai^hases of first reduction division, showing accessory 

 chromosome. 



Fig. 108. Polar view o£ first reduction division. 



Fig. 109. Side view of early anaphase of first reduction division. 



Fig. 110. Telophase of first reduction division, showing mitochondrial granules and ohromntoid 

 body. 



Fig. 111. Side view of metapbase of second division. 



Fig. 112. Polar view of metajjhase of second division. 



Fig. 113. Side view of anaphase of second dirision. 



Fig. 114. Late anaphase of second division. 



Fig. 116. Spermatid, showing idiozome, mitochondria, chromatoid body and centrosome. 



Figs, 117-125. Showing development of spermatozoa. 



Figs. 124, 125. Mature spermatozm. 



PL.VFE X. 



Figures 126-144 are from mouse; Figs. 145-151, from rabbit. 



All figures were drawn from prejjarations stained with Auebbach's method. 



Figs. 120, 127. Spermatogonia in resting stage. 



Fig. 128. Spermatogonium in prophase, showing chromosomes Jand nucleoli. 



Kg, 129. Spermatocyte in leptotenc stage. 



Fig. 130, Synaptic stage. 



Figs. 131-133. Spermatocytes of post-synaptic stiige, showing nucleoli. 



Fig. 134. Spermatocyte of late post-synai>lic stngp, showing change of staining capacity of 

 chromatin spiremes and nucleolus. 



Fig. 135. Nucleolus in late prophase. 



Figs. 139, 110. Metaphase and telophase of first division. 



Fig. 141, 142. Anaphase aud telo]ihase of second division, sho\ring chromatoid body. 



Figs. 143, 144. Spermatids, showing idiozome and chromatoid body. 



Fig. 145. Resting spermatogonium, showing idiozome. 



rig. 146. Resting i:)rimary spermatocyte. 



Fig. 147. Spermatocyte in synaiitic stage. 



Fig 148. Post-synaptic stage. 



Fig. 149, 150. Spermatocytes iu diploltne stage. 



lig. 151. Prophase of first reduction division. 



