1898-99. | ON THE CYTOLOGY OF NON-NUCLEATED ORGANISMS. 481 
PoE YEASI. CELE: 
I.— LITERATURE. 
The structure of the Yeast Cell, and more especially the question 
whether it has a nucleus or not, has been the subject of investigation by 
a large number of observers since 1844, when Nageli’ affirmed the exist- 
ence of a nucleus in this organism. Chief amongst these were 
Schleiden? (1849), Briicke® (1861), Schmitz‘ (1879), Strasburger® (1884, 
1887), Zalewski’ (1885), Krasser’ (1885 and 1893), Hansen*® (1886), 
Zacharias’ (1887), Zimmermann” (1887), Raum" (1891), Moeller” (1892 
and 1893), Hieronymus” (1893), Janssens" (1893), Dangeard” (1893 and 
1894), Macallum” (1895 and 1898), Buscalioni” (1896), Wager’ (1897 
1 Zeit, fiir Wiss, Botanik, Vol. I, p. 45, 1844. 
2 ‘*Grundziige der Wiss. Botanik,” 1849, p, 207. 
3 ‘‘Die Elementar-organismen.” Sitzungsber. der K, Akad, d. Wiss. zu Wien, Math-Nat. Classe, 
1861, Vol. XLIV, Abth. 2, 
4 ‘‘ Untersuchungen iiber den Zellkern der Thallophyten,”’ Sitzungsber. der Niederrhein. Gesell. fiir 
Natur-und Heilkunde zu Bonn, Sitzung am 4 Aug., 1879. 
5 ‘‘Das Botanische Practicum,” p. 339. 1887. Also edition of 1884, 
6 ‘*On Spore Formation in Yeast Cells.” Transactions of the Scientific Academy of Cracow. 
(Polish). Vol. XHI, 1885. Abstract in Bot. Centralbl., Vol. XXV, p. 1, 1886. 
7 ‘‘ Ueber das angebliche Vorkommen eines Zellkerns in den Hefezellen.” Oestereich. Bot. Zeits., 
1885; also: ‘‘ Ueber den Zellkern der Hefe:” ibid., 1893, p. 14. 
8 ‘‘ Recherches sur la Physiologie et la Morphologie des Ferments Alcooliques.” Meddelser fra 
Carlsberg Laboratoriet, Vol. II, p. 152, 1886. * 
9 ‘‘ Beitrage zur Kentniss des Zellkerns und der Sexualzellen.” Botanische Zeitung, 1887, Nos, 18-24. 
to ‘‘Die Morphologie und Physiologie der Pflanzenzelle.’”’ Breslau, 1887, p. 25. 
rt ‘Zur Morphologie und Physiologie der Sprosspilze.” Zeitschr. fiir Hygiene, Vol. X, p. 1, 1891. 
12 ‘* Ueber den Zellkern und die Sporen der Hefe.” Centralbl. fiir Bakt. und Parisitenkunde. 
Vol. XII, p. 537, 1892; also: ‘‘ Weitere Mittheilungen iiber den Zellern und die Sprosse der Hefe:”’ 
ibid., Vol. XIV, p. 358, 1893. 
13 ‘‘ Ueber die Organization der Hefezellen.’”’ Ber. d. deutsch. Bot. Gesell., Vol. XI, p. 176, 1893. 
14 “‘ Beitrige zu der Frage iiber Kern der Hefezelle.” Centralbl. fiir Bakt, und Parasitenkunde, 
Vol. XIII, p. 639, 1893. 
15 ‘Sur la structure histologique des levures et leur développement.” Comptes Rendus, Acad. d. 
Sciences, Vol. CX VII, p. 68, 1893 ; also: ‘‘ La structure des levures et leur développement.’ Le Botaniste, 
1894, p. 282. 
16 ‘**On the Distribution of Assimilated Iron Compounds, other than the Haemoglobin and Hzmatius, 
in Animal and Vegetable Cells.” Quart. Journ. Micro. Sci., Vol. XXXVIII, p. 243, 1895; also: ‘* On the 
Detection and Localization of Phosphorus in Animal’and Vegetable Tissues.” Proc. !Roy. Soc., Vol. 63, 
P- 467, 1898. 
17 ‘‘Il Saccharomyces guttulatus Rob.’’ Malpighia, Vol. X, 1896. 
18 ‘‘ The Nucleus of the Yeast Plant.’’ Report British Association, Toronto Meeting, 1897, p. 860; 
also: ibid., Bristol Meeting, 1898, p. 1,069, and Annals of Botany, Vol. XII, p. 499, 1808. 
