THE SPERMATOGENESIS OF AN HEMIPTERON, 
EUSCHISTUS 
THOS. H. MONTGOMERY, Jr. 
From the Zoological Laboratory, University of Pennsylvania 
147 FIGURES—FIVE PLATES 
CONTENTS 
ARE NOUN ULM e heat pane Meineke RPE OAS eS. wack nah ee eR. te ee eee 732 
ieherstucosomes: (ordinary Chromosomes) .. <2. 6.3... 5..02. <p ieee os ee 733 
i PODSCEMALIONS i .ectte ss Sahel so x sa, 3 Abe eee ue toqane ace eh alee ae eee 733 
B Discussion: continuity, conjugation and reduction ................ 747 
the mallosomes(moditied chromosomes) ...:) 5 .../...2.0 4 .(. «so qa el oe 755 
A The idiochromosomes and the discharge from the nucleus of the sper- 
MO HOYAGONAE Mln es he ch 5 Oe ae Oe ER Tin rin ers ERLE oe howe dthicre 755 
Be hhe mini he: ChrOMOSOMES 5. 24... .1-0.)... bern acon One Ie Rene ie eee 760 
Show LD MISKOWISISTIOROS. 08 eas od 8 sai nee eee RIANA Miser SE Gi Win inta Smo. pre ¢ oll 
het plasmosomes* kis es sau. Aaah sepals pls G ae Sek ee ee 762 
AMEE) OSCRVAUIONSteta aoe Sed uste aden ns ain ona oe Oe OR eee. 762 
Bee Discussion: enesissand kinds) of mucleolil 2 =e eee eee eee eee 764 
mherchromatoid corpuscless i: Lic 2s e-s «4 Aone oe aoe ee eae Sees 767 
@ellvaxes centrioles, Hagella. gc. %, 65. pase tae oe aa RE aE ne ee 768 
Wy toplasmicystruceures, oF. ioc <..s 5 micas ae i eee me 
AY AMatosome-and'cellyplate.. 2). 2c ah ote ee ee ee ee 7712 
BS ithenidiozomie:, 23247) 5 Vat atone sls 0 ae ee ear eee ae Pe 773 
@) MBhe spheres: 28, el ane ea ho gett Ad ea ead Cares tee 774 
DieRhyermitochondtria; Ahsan rt Saee eee e OO  Ce eee ei clinic 776 
Ei eHTDIS CUSSION). fy or 5 geiie goatee seh ES Ee ae ciegs orice AC 782 
Preformation and epigenesis in the germinal cycle, and segregation of the 
germ: Cells iMONbOSeNy coco toe oo a Oe ee Ot Poe Te Moraine eee 790 
Ginter ature cei tedicy. seis ie 2 aie Gate Goole eho PR ee ayes big iota earn? 792 
731 
