On the Diinegalous Spenn and Cliromosomal Variation of Euschistus, etc. 145 
Fig. 18. Lateral view of first maturation spindle. 
Fig. 19. Lateral view of anaphase of first maturatioiu 
Figs. 20, 21. Polar views of second spermatocytes before the chromosomes have 
become arranged in the equator of the spindle. 
Fig. 22. Polar view of second maturation spindle. 
Fig. 23. Lateral view of second maturation spindle. 
Figs. 24 — 26. Spermatozoa. 
Figs. 27 — 29. Gells of foUicle 4; 
Fig. 27. First spermatocyte, end of growth period. 
Figs. 28, 29. Spermatozoa. 
Figs. 30—32. Gells of foUicle 5: 
Fig. 30. Lateral view of first maturation spindle. 
Figs. 31, 32. Spermatozoa. 
Figs. 33—36. Gells of foUicle 6; 
Fig. 33. Polar view of spermatogonial monaster. 
Fig. 34. Lateral view of first maturation spindle. 
Figs. 35, 36. Spermatozoa. 
Plate X. 
Fig. 37. Portion of a longitudinal section through a part of the first foUicle 
(on the left) and a part of the second folücle (on the right) of the testis, with a 
part of the septum dividing the two. 
Figs. 38 — 56. GeUs of testis No. 120: 
Figs. 38, 39. Polar views of spermatogonial monasters, foUicle 1. 
Fig. 40. Polar view of first maturation spindle, foUicle 2. 
Figs. 41 — 43. Lateral views of first maturation spindles, foUicles 1 and 3. 
Fig. 44. Polar view of first maturation spindle, foUicle 2. 
Figs. 45 — 47. Lateral views of first maturation spindles, in no one of them aie 
aU the chromosomes shown, foUicle 3. 
Figs. 48 — 51. Polar views of first maturation spindles, fig. 48 from folUcle 2, 
the others from folücle 3. 
Figs. 52 — 55. Polar \-iews of second maturation spindles, foUicle 1. 
Fig. 56. Anaphase of second maturation, lateral view, foUicle 1. 
Figs. 57, 58. Lateral views of first maturation spindles of testis No, 267, 
folUcles 1 and 2 respectively. 
Fig. 59. Polar view of first maturation spindle, testis No. 103, foUicle 4. 
Fig. 60. Polar view of second maturation spindle, testis No. 286, foUicle 1. 
Fig. 61. Lateral view of second maturation spindle, testis No. 103, foUicle 1. 
Archiv f. Zellforschung. V. 
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