EXPLANATIONS AND REFERENCES, 



PLATE CLIII. 



Figures mostly magnified 500 diameters. 



PAGE. 



Fig. 1-5. PANDORINA MORUM, forms most frequent, . . 161 



Figs. 6, 7. Coenohia with more numerous cells densely clustered, 161 



" 8, 9. Very fugatious forms, a variety or a distinct species. . .161 



Fig. 10. A matured coenobium with young spheres in condition for in- 

 dependent existence ... .161 



" 11-26. CHLAMYDOCOCCUS PLUVIALIS. ..... l' ; 4 



Figs. 11, 12. Two cells of normal condition, . . . 165 



Fig 13-26. Cells of polymorphous resting forms, . . . 165 



" 27-29. Zoospores without envelope, .... 165 



" 30-32. Zoospores enveloped in a membrane, . . . 165 



" 33. Commencement of a division of a green cell, . 165 



" 34. Division completed. . . . . : .165 



" 35-51. Numerous multiform conditions transpiring in the life of this 



little plant. For description of each see page, . .166 



