A Study of the Early Maturation Stages in the Male and Female Homophron Americanum Page: iv

                                
LIST OF ILLUSTRATIONS
Peage
Plates   .   * .    .   .  .  .     .  .  .    a    .      26
1Fig. 1  A group of oogonia.
Fig. 8 Late metaphase of an oogonium.
Fig. 5   Oblique section of an oogon.itu  in which
the chraomosomes are lined up on the spindle.
Fig. 4 A resting ooeyte.
PlaeII .     .  .     . .     a  .  .  .    a .  .   a .a   7
Fig. 5 Iptotene stage of ogeuestas.
Fig. 6 Zygotene stage of oogeneais.
Fig. ?  Peehytene stage of oonesals.
Fig. 8  Growth stage showing the chromosomes
scattered throughout the nucleus.
Plate III    .  .    .  a *   .   *  .  *  a .     .  .   28
FPig. 9 Synise atie of oogenesaias.
Fig. 10 Vaouolated shromosoas   or diplotene of
the second growth period of oogeeasls.
Fig. 11 Germinal vesile stage of oogenesis.
Plate IV     . .  .  .        ..        * *  .   * *  *   29
Fig. 12 A polar oogonium.
Fig. 13 Diskinesis of epersatogenesis
Fig 14 Tetreds on the spindle
Fig. 15 Seoondary speratoeyte preparatory to
division to form the apertid..
Plate      .* a .  .      . *. .  a  .        *    a  .. 30
Fig. 16 A secondary speratoeyte showing the
I  hromosome.
Fig. 17 A secondary sperustocyte showing the
T  hra   some.
Fig. 18 Representative stages in the metamor-
phosis of the spernatid.
Fig. 19 Mature spermat ooe

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