172 CHROMOSOMES IN THK SPEKMATOOENESIS OF THE HEMIPTEKA HETEROPTERA. 



Figs. 226-228, Cymus angiistatus. 

 Fig 226, pole view, second maturation spindle (v. 1901fc, Fig. 144). 

 Figs. 227, 228, second maturation spindles. 



Plate XIII. 

 Figs. 229-236, Tiiigix clm-nta. 

 Fig. 229, pole view, first maturation spindle. 

 Fig. 230, oblique lateral view of the same stage. 

 Fig. 231, pole view, first maturation spindle. 

 Figs. 232-234, pole views, secon<i maturation spindles. 

 Figs. 235, 236, chromosome plates of spermatids. 



Fig. 237, riiymtiln sp. 

 Fig. 237, spermatogonic monaster (v. lOOli, Fig. 200). 



Figs. 238-244, AchoUn iniillispinosa. 

 Fig. 238, spermatogonic monaster (v. lOOlft, Fig. 207). 

 Fig. 239, spermatocyte nucleus, rest stage. 

 Fig. 240, first maturation spindle. 

 Figs. 241, 242. pole views, first maturation spindle. 

 Figs. 243, 244, pole views, second maturation spindles (with 243 v. 1901i, Fig. 211). 



Figs. 245-250, Sinea didthmn. 

 Fig. 245, spermatocyte nucleus, rest stage. 

 Fig. 246, pole view, first maturation spindle. 



Fig. 247, oblique lateral view of chromosomes, first maturation spindle. 

 Figs. 248-250, first maturation spindles (v. 190U/, Figs. 217, 218). 



Figs. 251, 252, Prionidiis crixtatiis. 

 Fig. 251, spermatogonic monaster (v. 1901i, Fig. 224). 

 Fig. 252, spermatocyte nucleus, rest stage. 



Figs. 253-258, Znilhn up. 

 Fig. 253, spermatogonic monaster. 

 Fig. 254, spermatocyte, rest stage. 

 Fig. 255, first maturation spindle. 

 Fig. 256, pole view, first maturation spindle. 

 Figs. 2.57, 258, lateral and pole views, second maturation spindle. 



Figs. 259-268, Hygnirnlnifs sp. 

 Fig. 259, spermatogonic monaster (v. 1901J, Fig. 229). 

 Fig. 260, spermatocyte nucleus, rest stage. 

 Fig. 261, late prophase, first maturation division. 



Figs. 262-264, lateral and pole views, first maturation spindle (with 264 v. 190H), Fig. 231). 

 Figs. 265-267, lateral and pole views, second maturation spindle. 

 Fig. 268, chromosome plate of a spermatid. 



Figs. 269-274, Linuiiilicrlinx miirgiiwtvx. 

 Fig. 209, spermatocyte, nucleus, rest stage. 



Fig. 270, monosome and plasmosome, early prophase of first maturation division. 

 Figs. 271, 272, pole and lateral view, first maturation spindle (v. 1901/), Fig. 233). 

 Figs. 273, 274, lateral and pole view, second maturation spindle. 



