Seedlings of Zea Mais and Phoenix dactylifera . 287 
Puriewitsch (’98) : Physiologische Untersuchungen iiber die Entleerung der Reservestoffbehalter. 
Jahrb. wiss. Bot., xxxi, i, 1898. 
Rosen (’95): Beitrage zur Kenntniss der Pflanzenzellen. Cohn’s Beitrage, vii, 225, 1895. 
Rosenberg (’99) : Physiologisch-cytologische Untersuchungen iiber Drosera rotundifolia . Upsala, 
1899. 
Schimper (’82) : Notizen iiber insectenfressende Pflanzen. Bot. Zeit., 1882. 
*Schniewind-Thies (’97) : Beitrage znr Kenntniss der Septalnectarien. Jena, 1897. 
Timberlake (’01) : Starch formation in Hydrodictyon utriculatum. Ann. Bot., xv, 619, 1901. 
Torrey (’02) ; Cytological changes accompanying the secretion of diastase. Bull. Torrey Bot. Club, 
xxix, 421, 1902. 
Townsend (’97) : Der Einfluss des Zellkernes auf die Bildung der Zellhaut. Jahrb. wiss. Bot.,xxx, 
484, 1897. 
Van Gehuchten (’90) : Le mecanisme de la secretion. Anat. Anzeig., 1, 1891. 
Van Wisselingh (’00) : Ueber Kemtheilung bei Spirogyra. Flora, lxxxvii, 355, 1900. 
Zimmermann (’93) : Botanical Microtechnique. (Trans, by Humphrey, New York, 1893.) 
(’96) : Die Morphologie und Physiologic des pflanzlichen Zellkernes. Jena, 1896. 
explanation of figures in PLATE XX. 
Illustrating Mr. Reed’s paper on Enzyme-secreting Cells. 
All figures were drawn with Abba’s camera lucida, Zeiss 1/16 oil immersion objective, and 
compensating oculars 8, 12, and 18. Figs. 1-8 were drawn from the epidermal cells of the scutellum 
of Zea Mais. Figs. 9-13 were drawn from the epidermal cells of the absorbing organ of Phoenix 
dactylifera. 
Fig. 1. Nucleus in the resting condition. Saturated solution of mercuric bichloride. Kleinen- 
berg’s Haematoxylin. x 1550. 
Fig. 2. Cell after absorbing water for three hours. Mann’s Piero -corrosive killing fluid. 
Mann’s Eosin-Toluidin Blue, x 1550. 
Fig. 3. Cell after thirty hours’ activity. Worcester’s killing fluid. Mann’s Eosin-Toluidin 
Blue, x 1550. 
Fig. 4. Nucleus after forty-eight hours’ activity. Worcester’s killing fluid. Mann’s Eosin- 
Toluidin Blue, x 1550. 
Fig. 5. An unusually swollen nucleus after three days of activity. Worcester’s killing fluid. 
Mann’s Eosin-Toluidin Blue, x 1550. 
Fig. 6. Normal nucleus after three days of activity. Worcester’s killing fluid. Mann’s Eosin- 
Toluidin Blue, x 1550. 
Fig. 7. Cell after eight and one-half days of activity. Worcester’s killing fluid. Mann's 
Eosin-Toluidin Blue, x 1600. 
Fig. 8. Cell after thirteen days of activity. Worcester’s killing fluid. Mann’s Eosin-Toluidin 
Blue, x 1600. 
Fig. 9. Cell after six days of activity. Worcester’s killing fluid. Kleinenberg’s Haematoxylin. 
x 1550. 
Fig. 10. Cell after fourteen days of activity. Worcester’s killing fluid. Kleinenberg’s 
Haematoxylin. x 1550. 
Fig. 11. Cell after eighteen days of activity. Worcester’s killing fluid. Mann’s Eosin-Toluidin 
Blue, x 1550. 
Fig. 12. Cell after twenty-six days of activity. Mann’s Picro-corrosive fluid. Kleinenberg’s 
Haematoxylin. x 1550. 
Fig. 13. Cell after thirty-three days of activity. Worcester’s killing fluid. Flemming’s triple 
stain, x 1550. 
