236 MONTGOMERY A STUDY OF THE CHROMOSOMES OF THE GERM CELLS OF METAZOA. 



Sinea diadema, Fiijs. SIS-SIS. 



Fiv>. '-12, 213. Nuclei of first spermatocytes, tclaphase. 



Fji;s. '.214, 215. Pole views of uionasters, first maturation mitosis. 



Fig. 216. Lateral view of the plurivalent chromosome of the first maturation mitosis showing the mantle fibre 



attachments. 

 Figs. 217, 218. Lateral views of successive anaphases, first maturation mitosis. 



Limnobates lineata. 

 Fig. 219. Nucleus of first spermatocyte, rest stage. 



PrioniAus crixintm, Figs. SSO-SS5. 



Figs. 220-222. Spermatogonic nuclei, rest stage. 

 Figs. 223, 224. Spermatogonic monasters, pole views. 

 Fig. 225. Nucleus of first spermatocyte, rest stage. 



Milyas einctui, Figi. 226-S2S. 

 Figs. 226-228. Nuclei of first spermatocytes, rest stage. 



Hygotrechus gp., Figs. SS9-SS1. 



Fig. 229. Spermatogonic monaster, pole view. 



Fig. 230. Nucleus of first spermatocyte, synapsis stage. 



Fig. 231. Pole view of monaster, first maturation mitosis. 



LimnotrecTiut marginatu*, Figs. SSS, SSS. 



Fig. 282. Nucleus of first spermatocyte, rest stage. 



Fig. 233. Pole view of monaster, first maturation mitosis. 



Pelocoris femorata. 

 Fig. 234. Spermatogonic monaster, pole view. 



, Zaitha sp., Figs. XSS-SSS. 



Fig. 235. Spermatogonic nucleus, rest stage. 



Figs. 236, 237. Spermatogonic monasters, pole views. 



Fig. 238. Pole view of monaster, first maturation mitosis. 



