OF THE GKRM CELLS OF METAZOA. 23") 



Figs. 161-165. Kuclci of first spermatocytes, rest stage. 



Fig. 166. Nucleus of first sperniatocyte, late propkase, showing all the chromatiu elements. 

 Figs. 167, 168. Pole views of mouasters, first maturation mitosis. 

 Fig. 169. Lateral view of same stage, five of the chromosomes not shown. 

 Fig. 170. Lateral view of anaphasu, first maturation mitosis. 



Fig. 171. Pole view of second spermatocyte, chromatin elements not definitely arranged in the equator of the 

 spindle. 



Leptopterna dolabrata, Figs. 172-116. 



Figs. 172-175. Nuclei of first spermatocytes, growth period. 

 Fig. 176. Polo view of monaster, second (?) maturation mitosis. 



Calocoris rapidus, Figs. 177-188. 



Fig. 177. Spermatogonic monaster, pole view. 



Figs. 178-180. Nuclei of first spermatocytes, telaphase. 



Fig. 181. Oblique lateral view of the spindle before the chromosomes are arranged in the plane of the equator, first 



maturation mitosis. 



Figs. 183-184. Oblique lateral views of monasters, first maturation mitosis. 

 Figs. 185, 186. Pole views of the same stage. 

 Figs. 187, 188. Pole views of monasters, second maturation mitosis. 



Pcecilocapsus lineatus, Figs. ISO, 190. 



Fig. 189. Nucleus of first spermatocyte, early telaphase. 

 Fig. 190. Pole view of monaster, first maturation mitosis. 



Plate V. 



Pmeiloeapsus gonipJiorus, Figs. 191-10S. 



Figs. 191-195. Nuclei of first spermatocytes, rest stage. 



Figs. 196, 197. Pole views of mouasters, first-maturation mitosis. 



Fig. 198. Lateral view of the same stage. 



Phymata sp., Figs. 100-203. 



Fig. 199. Spermatogonic nucleus, rest stage. 



Fig. 200. Spermatogonic monaster, pole view. 



Fig. 301. Nucleus of first spermatocyte, telaphase. 



Fig. 202. Pole view of monaster, first maturation mitosis. 



Fig. 203. Lateral view of same stage. 



Coriscus ferns, Figs. 204-206. 



Figs. 204, 205. Nuclei of first spermatocytes, telaphase and rest stages respectively. 



Fig. 206. Pole view of first spermatocyte, the chromosomes not definitely arranged in the plane of the equator of I lie 

 spindle. 



Acholla midtispinosa, Figs. 207-211. 



Fig. 207. Spermatogonic monaster, pole view. 

 Figs. 208, 209. Nuclei of first spermatocytes, early prophasc. 

 Fig. 210. Pole view of monaster, first maturation mitosis. 

 Fig. 211. Pole view of monaster, second maturation mitosis. 



