Beer.— On Elaiop lasts. 
7i 
References to Literature. 
1 . Wakker, J. H. : Studien liber die Inhaltskorper der Pflanzenzelle. Pringsh. Jahrb. f. wiss 
Bot., xix, 1888, p. 423, &c. 
2 . Zimmermann, A. : Ueber die Elaioplasten. Beitrage z. Morphol. u. Physiol, d. Pflanzenzelle, 
1893, p. 185, &c. 
3 . Raciborski, M. : Ueber d. Entwicklungsgesch. d. Elaioplasten d. Liliaceen. Anzeig. d. Akad. 
d. Wiss. in Krakau, 1893, p. 259. I was unable to obtain this paper and quote from the 
abstract in Bot. Centralbl., lvii, 1894, p. 305. 
4 . Pfeffer, W. : Die Oelkorper der Lebermoose. Flora, 1874, p. 2, &c. 
5 . Garjeanne, M. J. : Die Oelkorper der Jungermanniales. Flora, xcii, 1903, p. 457, &c. 
6. Radlkofer, L. : Zur Klarung von Theophrasta und der Theophrasteen. Sitzungsber. d. 
math.-physik. Kl. d. K. B. Akad. d. Wiss. zu Miinchen, xix, 1889, p. 221. 
7 . : Ueber die Gliederung d. Familie d. Sapindaceen. Ib., xx, 1890, p. 105. 
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1894. 
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xix, 1882, p. 262. 
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im Pflanzenreiche. Bot. Zeit., 1880, p. 340. 
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explanation of figures in PLATE IV. 
Illustrating Mr. Beer’s Paper on Elaioplasts. 
All the figures refer to tissues of Gaillardia Lorenziana. Preparations examined and drawn 
in -6 per cent. NaCl solution unless otherwise stated. 
Fig. 1. Very young cell of corolla-hair before elaioplasts have developed. Leucoplasts dis- 
tributed in the cytoplasm, x 1075. 
Fig. 2. Apex of another corolla-hair showing scattered leucoplasts. x 650. 
Fig. 3. Young cell of corolla-hair showing an early stage in the aggregation of plastids. x 650. 
Fig. 4. Corolla-hair showing a stage in aggregation of plastids. x 650. 
Fig. 5. Corolla-hair with later stage of elaioplast development, x 650. 
Figs. 6, 7, 8. Elaioplast completely developed in corolla-hairs, x 650. 
Fig. 9. Cell from older corolla-hair. Elaioplast elongated and showing first indication of 
disintegrating, x 650. 
