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Wilson Spermatogenesis in the Bryophyta. 
Fig. 5. Late prophase of penultimate division. 
Fig. 6. Constriction of large body from nucleolus before final division. 
Fig. 7. Constriction of two bodies from nucleolus before final division. 
Fig. 8. Body separated from nucleolus and lying in the nucleus before the final division. 
Fig. 9. Early prophase of final division. 
Fig. 10. Late prophase of final division. 
Fig. 11. Metaphase of final division in side view. 
Fig, 12. Metaphase of final division in polar view. 
Fig. 13. Anaphase of final division in side view. 
Fig. 14. Anaphase of final division in polar view. 
Fig. 15. Telophase of final division. 
Fig. 16. Shortly after contraction from the enclosing cell-wall. 
Fig. 17. Nucleolus constricting. 
Fig. 18. Bodies produced from nucleolus in cytoplasm. Outline of nucleus not shown. 
Fig. 19. Formation of rod-like bodies. Outline of nucleus not shown. 
Fig. 20. Views of the same spermatid at two foci : ( a ) showing rod-like bodies, (£) nucleus 
with nucleolus divided into three bodies. 
Figs. 21 and 22. Nucleus with undivided nucleolus and rod-like bodies in cytoplasm. 
Figs. 23 and 24. Nucleus with nucleolus divided into two and rod-like bodies in cytoplasm. 
Fig. 25. Commencement of fusion of rod-like bodies. 
Figs. 26 and 27. Fusion of rod-like bodies. 
Figs. 28-31. Stages in formation of limosphere, a!ppendage, and blepharoplast. Outline of 
nucleus not shoivn. 
Fig. 32. Elongating nucleus and developing limosphere. 
Fig. 33. Elongation of blepharoplast. 
Figs. 34-8. Formation of thread from blepharoplast. Outline of nucleus not shown. 
Figs. 39-41. Stages in elongation of nucleus. 
Fig. 42. Almost mature spermatozoid enclosed by original cell- wall. 
Fig. 43. Double spermatid. 
Fig. 44. Spermatid stained with iodine solution. 
Atrichum undulation. 
Fig. 45. Cell from young antheridium, showing constriction of nucleolus. 
Fig. 46. Metaphase of final division in side view. 
Fig. 47. Metaphase of final division in polar view. 
PLATE XXXVIII. 
Fig. 48. Anaphase of final division in side view. 
Fig. 49. Anaphase of final division in polar view. 
Fig. 50. Shortly after contraction from the enclosing cell-wall. 
Fig. 51. Nucleolus dividing; blepharoplast in cytoplasm. 
Fig. 52. Nucleolus dividing ; blepharoplast on periphery. 
Figs. 53-5. Nucleolus dividing ; formation of thread from blepharoplast. 
Fig. 56. Nucleus in contact with thread ; bodies passing into cytoplasm. 
Fig. 57. Limosphere and accessory body in cytoplasm. 
Fig. 58. Limosphere and accessory body in cytoplasm. Spermatid viewed in plane perpendicular 
to that seen in Fig. 57. 
Fig. 59. Elongation of nucleus ; limosphere and accessory body. 
Fig. 60. Almost mature spermatozoid, showing limosphere and accessory body. 
Pellia epiphylla . 
Fig. 61. Resting cell from young antheridium. 
Fig. 62. Early stage of prophase, showing chromatin masses near periphery of nucleus. 
Fig. 63. Slightly later prophase. 
Fig. 64. Prophase, showing elongated nucleus and centrospheres (?). From antheridium 
showing fifty-two cells in cross-section. 
