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Sidnov I. Kornhauser 
Fig. 120. Propliase of first spermatoc 3 ’te of E. curvala sliowing attachment of 
rr-cliroinosoine to autosome bivalents. 
Fig. 121. Late prophase of first spermatoc^'te of E. curvala, showing all the 
chroniosomes. The a:-elenient is longitudinally cleft. Smear preparation. 
Figs. 122 — 141. First sperniatocyte division of Enchenopa 
hinotaia. 
Figs. 122 — 125. Consecutive sections (122 — 124 optical sections) of metaphase. 
Lateral view, sho\ving all ten bivalents. 
Figs. 126 — 127. Metaphase in polar view. 
Figs. 128 — 135. Lateral views showing the allosome pair (xy). 
Fig. 136. Lateral view of metaphase, from edge of section, stained in crj'stal 
violet after fixation in Herm.vxx’s fluid, showing quadripartite form of autosome 
gemini and deepl}- staining xy pair. 
Fig. 137. Early anaphase, lateral view. The connecting strand of the xy pair 
just broken. 
Fig. 138. Early anaphase from edge of section. xy pair deeply stained. Fixation 
in Hermaxn’s fluid, crv’stal violet stain. 
Fig. 139. Later anaphase. 
Fig. 140. End of anaphase. Clu-omosomes in flat plate. 
Fig. 141. Polar \iew of chromosome complex belonging to onc of the second 
spermatocjTes. The chromosomes are longitudinally cleft in preparation for the second 
division. 
Plate XXI. 
P'igs. 142 — 163. Division of first sperniatocyte of Enchenopa 
curvala. 
Figs. 142 — 143. Polar views of metaphase. 
Figs. 144 — 147. Consecutive sections (144 — 146 optical sections) during meta- 
phase. Lateral view showing all the chromosomes. 
Figs. 148 — 149. Lateral views of metaphase showing the thick fibers betw’een 
the a:-chromosome and the autosomes. 
Fig. 150. Section of a cell in early anaphase. Lateral view% showing the x-element. 
Figs. 151 — 152. Later anaphase in lateral view. The Separation of the auto- 
somes and the lengthening of the a;-clu'omosonie is here normal. 
Fig. 153. Late anaphase and passing of x-chromosome to the npper cell. 
Fig. 154. Stage corresponding to Figure 153, showing only the cell to which 
the o'-chromosome passes, ^iewed from the equator of the spindle. 
Figs. 155 — 163. Anaphase. Lateral views showing unusual cases in w'hich the 
y-element is either rotated 90° on its axis (Figs. 155, 157 — 159), or is dr.awn out in nor- 
mal Orientation and sometimes divided (Figs. 156, 160 — 163). 
Figs. 164 — 179. Second spermatocyte division of Enc/»e«opa 
hinotaia. 
Figs. 164 — 166. Metaphase in polar view. 
Figs. 167 — 169. Consecutive sections of a single cell in metaphase. Lateral view 
showing all ten chromosomes. 
