THK GIIREN CELLS OP CONVOLUTA ROSCOFFENSrS. 217 



16. 1899. Georgevitscit, J. — "Etude sur le Developpemeiit de la Coii- 



voluta roscoffensis," ' Arcliiv. d. Ziol. Exp. et Gen.,' ser. iii, vol. 

 vii, pp. 343— 3G1. 



17. 1900. Blackman, E. F.—" The Primitive Algfe and the Elagellata," 



'Ann. of Bot.,' xiv, 1900. 



18. 1900. Dangeakd, P. A. — " Les Zoochlorelles d. Paramecium," ' Le 



Botaniste/ 7lli ser., fasc. 3, 4, 1900. 



19. 1903. Gamble, E. W.,and Keeble, E. — " Tiie Bionomics of Convoluta 



roscoffensis, etc," 'Quart. Journ. Micros. Sci.,' vol. Ivii, 1903. 



20. 1903. WiLLE, N.— 'Algologische Notizen,' vols, ix — xiv, 'N}'t. Magazin 



for Naturvidenskaberne,' vol. xli, 1903. 



21. 1904. Oltmanns, E. — 'Morphologic ii. Biologic d. Algcu' (Jena, 1904), 



vol. i, p. 139; sec also p. 374, vol. ii, 19(15, for literature on " Zoo- 

 chlorellen." 



22. 1904. West, G.—' The British Fresh-water Algse,' Cambridge, p. 188. 



23. 1905—1906. Graef, L. von.— "Turbellaria," in Bronn's ' Thierreich,' 



vol. ii, 1905—1906. 



24. 1905. Keeble, E., and Gamble, E. W. — "The Isolation of the infecting 



Organism of Convoluta roscoffensis," 'Proc. Roy. Soc.,' ser. b, 

 1905 (an abstract of Section III of this paper). 



25. 1905. Pratt, E. I^I.— " Zoochlorella3 and Digestive System of Alcyo- 



naria," 'Quart. Journ. Micros. Sci.,' vol. 49, 1905. Ceylon Peail 

 Oyster Eisheries, Suppl. Rep. xix. 



EXPLANATION OF PLATES 13 & U, 



Illustrating' the paper by Dr. Keeble and Dr. Gamble on 

 "The Green Cells of Convoluta roscoffensis." 



Reference Letters. 



£acL Bacteria on the caps, (egg-capsule). B. If. Basement membrane, 

 C. Empty cyst left by an escaped flagellated cell from the palmella state. CHL. 

 Chloroplast. Cil. Cilia. C. PI. Cytoplasmic plug forming the " neck" of the 

 green cell. Ep. Epidermal layer, G. c. Green cells. Mes. C. Mesenchyme 

 (probably phagocytic) cells of Convoluta. Mn. Mucilage of wall of green 

 cell. Nu. G. C. Nucleus of green cell. Nii. Mes. Nucleus of mesenchyme 

 cell associated with the green cell. Oo. Eggs of Convoluta in the common 

 capsule. Pi/r. Pyrenoid, St. Stigma (eye-spot). 



