370 
PR KS SWELL SHEARER. 
Figs. 34 and 35. — Stages in tlie oogonial cycle. Sublimate-nitric. 
Fig. 38. — Oogonial stages. Sublimate-acetic. 
PLATE 33. 
Fig. 37. — Female egg showing a section of aster and spindle of first 
maturation division. Twenty chromosomes are shown going out, and 
twenty remaining in the egg. Perenyi’s solution. 
Figs. 38 and 39. — Maturation stages of male egg. First and second 
polar bodies. Perenyi's solution. 
Fig. 40. — Female egg. First maturation division. Perenyi's solution. 
Fig. 41. — Male egg. Polar view of spindle of first maturation division. 
Perenyi's solution. 
Fig. 42. — Section through the ovarian region of ripe female, similar 
to those of figs. 21 and 32. Fixed in Perenyi's solution, and stained 
Benda's iron-haem atoxylin. 
Fig. 43. — Male egg anaphase of second maturation division. Perenvi. 
Fig. 44. — Female egg. First maturation division. Perenyi. 
Fig. 45 — Male egg. First maturation division. Perenyi. 
Fig. 46. — Male egg. First segmentation division. 
Fig. 47. — Female egg. First maturation division. Perenyi. 
PLATE 34. 
Fig. 48. — Male egg. First segmentation division, showing twenty 
chromosomes. Perenyi. 
Fig. 49. — Female pronucleus from oogonial cell. Sublimate-acetic. 
Fig. 50. — Nucleus of female egg. Showing its two divisions. Perenyi. 
Fig. 51. — Female pronucleus from oogonial cell. 
Fig. 52 . — Female egg showing the separate nuclei into which the 
chromosomes break down. 
Figs. 53 and 54. — Female pronuclei from oogonial cells showing the 
endochromatic granules. 
Fig. 55. — Capsule showing two female and one male egg with 
polar bodies. 
Fig. 56. — Two female eggs in capsule showing separate nuclei into 
which the chromosomes break down. 
Fig. 57. — Capsule same as fig. 55 before formation of polar bodies. 
Fig. 58. — Female egg with nuclei and asters. 
Fig. 59. — Separate bodies into which the female chromatic substance 
divides in late stages. 
