234 



MONTGOMEBY — A STUDY OF THE CHROMOSOMES 



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



Pig. 110. Lateral view of the same stage, showing all the chromatin elements. 



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



Frotenor betfragei, Wigs, llS-l/ f l. 



Fig. US. Spermatogonia nucleus, curly prophase. 



Figs. 119-12;!. Spermatogonia 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 spermatocytes, telaphase. 



Figs. 131-134. Nuclei of first, spermatocytes in successive prophases. 



Figs. 135, 130. Lateral views of successive monaster stages, first maturation mitosis, all the chromatin elements 



shown in Fig. 185. 

 Fig. 137. Pole view of the stage of Fig. 130. 

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



Fig. 189. Pole view of second spermatocyte, chromosomes not definitely arranged in the equator of the spindle. 

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

 Fig. 141. Still later anaphase. 



Plate IV. 



Gymus auguslatus, Figs. 1^-144- 



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



Fig. 143. Pole view of one daughter cell (second spermatocyte) of the dyuslcr 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 (dements seen on 



end view, except the one marked a. 



Ichnodemus f aliens, Figs. 145-I4S. 



Fig. 145. Spermatogone monaster, 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. 118 two of the chromosomes viewed 

 laterally. 



Pelioptlta abbreviata, Figs. 149-151. 



Fig. 140. Spermatogonic monaster, pole vie*. 



Fig. 150. Pole view ot monaster, first, maturation mitosis. 



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



(Edaneala <l<irs<ilis, Wigs. IBS-IBS. 



Fig. 152. Spermatogonic nucleus, rest stage. 



Figs. 153, 151. Spermatogonic monasters, pole views. 



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



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



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



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



Onoopeltus faeciatus, Figs. ISO 1.71. 



Fig-. 150. Spermatogonic nucleus, early prophase. 

 Pig. 100. Spermatogonic monaster, pole view. 



