234 MONTGOMERY A STUDY OF THE CHK( >Mos< iMES 



Figs. 114, 115. Pole views of monasters, first maturation mitosis. 



Fig. 110. Lateral view of the same stage, showing all the chrorualin elements. 



Fig. 117. Pole view of spermatid at the close of the second maturation division. 



Protenor belfragei, Figs. 118-141. 



Fig. 118. Spermatogonic nucleus, early prophase. 



Figg. 119-123. Spermatogonic monasters, pole views. 



Fig. 124. Nucleus of first Spermatocyte, synapsis. 



Figs. 125-128. Lateral views of the large chromosome x, from nuclei in the late synapsis stage. 



Figs. 129, 130. Nuclei of first sperrnatocytes, telaphase. 



Figs. 131-134. Nuclei of first spcnnatocytes in successive prophases. 



Figs. 135, 136. Lateral views of successive monaster stages, first maturation mitosis, all the chromatin elements 



shown in Fig. 135. 



Fig. 187. Pole view of the stage of Fig. 136. 

 Fig. 138. Lateral view of the anaphase, first maturation mitosis. 



Fig. 139. Pole view of second spermatocy te, chromosomes not definitely arranged in the equator of the spindle. 

 Fig. 140. Lateral view of auaphase, second maturation mitosis. 

 Fig. 141. Still later anaphase. 



Plate IV. 



Cymus auguslatut, Figs. 142-144. 



Fig. 142. Lateral view of monaster, first maturation mitosis. 



Fig. 143. Pole view of one daughter cell (second spermatocyte) of the dyaster stage of the first maturation mitosis, 



the univalent chromatin elements seen laterally. 

 Fig. 144. Pole view of one chromosome plate, metakinesis of first maturation mitosis, chromatin elements seen on 



end view, except the one marked a. 



Ichnodemus falicug, figs. 145-148. 



Fig. 145. Spermatogonic mouaster, pole view. 



Fig. 146. Nucleus of first spermatocyte, late prophase, showing all the chromatin elements. 



Figs 147, 148. Pole views of monasters, first maturation mitosis, in Fig. 148 two of the chromosomes virwnl 

 laterally. 



PcUoptlta abbreaiata, Figs. 140-151. 



Fig. 149. Spermatogonic monaster, pole view. 



Fig. 150. Pole view of monaster, first maturation mitOMv 



Fig. 151. Lateral view of same stage, two of the large chromosomes not shown. 



tKiiiiii,;il.n dortalit, Fin*. l5,'-i~>ft. 



'Fig. 152. Spermatogonic nucleus, rest stage. 

 Figs. 153, 154. Spernmtogouic monasters, pole views. 

 Fig. 155. Nucleus of first spermatocyte, rest stage. 

 Fig. 156. Pole view of monaster, first maturation mitosis. 



Fig. 157. Lateral view of the same stage, three of the chromosomes not shown. 

 Fig. 158. Lateral view of the anaphase, first maturation mitosis 



Oneofrltut fancialu*, Fig>. 159-171. 



Fig. 15!t. Spi.Tinatogouic nucleus, early prophiisc. 

 Fig. 160. Spermatogonic monaster, pole view. 



