CHROMOSOMES IN THE SPERMATOGENESIS OF THE HEMIPTERA HETKROPTERA. 169 



Fig 



Fig. 



Fi 



Fi 



Fig 



Figs. 09-73, Eurygtister (ilti-rniilus. 

 ()9, sperinatoc3'te nucleus, late postsynapsis. 



70, first maturation spindle, the chromosomes not in clefiuite arrangement. 



71, pole view of the same stage. 



72, pole view, second maturation spindle. 



73, idem, lateral view. 



Figs. 74-80, Perihahis limhnlnris. 

 Fig. 74, spermatogonic monaster. 



Fig. 75, spermatocyte nucleus, near end of growth period. 

 Fig. 76, pole view, first maturation spindle (v. 19016, Fig. 37). 

 Fig. 77, oblique lateral view of the same stage. 

 Fig. 78, pole view, second maturation spindle. 

 Fig. 79, daughter plate, first maturation division. 

 Fig. 80, oblique lateral view, second maturation spindle. 



Figs. 81-93, Niihis anmdtitiia. 

 Figs. 81-85, successive prophases, first maturation division. 

 Fig. 86, pole view, first maturation spindle (v. 1901«, Fig. 14). 

 Figs. 87, 88, lateral views, first maturation spindle. 

 Fig. 89, pole view of early daughter plate of preceding division. 

 Figs. 90, 91, second maturation spindles. 

 Figs. 92, 93, chromosome plates of spermatids. 



Figs. 94-106, Ifiiniioslnf irjlcxiiliis., 

 Figs. 94, 95, spermatogonic monasters. 

 Fig. 96, spermatocyte nucleus, synapsis. 

 Fig. 97, idem, postsynapsis. 

 Fig. 98, idem, later postsynapsis. 

 Fig. 99, idem, rest stage. 



Figs. 100, 101, idem, early prophases of first maturation division. 

 Figs. 102, 103, first maturation spindles (v. 1901//, Figs. 113, 116). 

 Fig. 104, second maturation spindle. 

 Figs. 105, 106, chromosome plates of spermatids. 



Figs. 107-116, Corizus nltcrnalus. 

 Fig. 107, spermatogonic monaster (v. 1091«, Fig. 18). 

 Fig. 108, spermatocyte nucleus, late synapsis. 

 Figs. 109, 110, idem, postsynapsis. 

 Fig. Ill, idem, rest stage. 



Figs. 112, 113, the autosome A, a, prophase of first maturation division. 

 Figs. 114-116, successive prophases, first maturation division. 



Plate XI. 

 Figs. 117-122, Corizus ulleniutus. 

 Fig. 117, pole view, first maturation spindle. 

 Fig. 118, lateral view of the same stage. 

 Fig. 119, daughter chromosomal plate of preceding stage. 

 Fig. 120, pole view, second maturation spindle. 

 Figs. 121, 122, second maturation spindles. 

 A. P. S.— XXI. S. 27, 8, '06. 



