24 BOTANICAL GAZETTE [JANUARY 
HorrMAN, H.: Die Pollinarien u. Spermatien von Agaricus. Bot. Zeit. 
14:137. 1856. 
. IstvANFFI, G.: Uber die Rolle der Zellkerne bei der Entwick. d. Pile, 
Ber. d. deutsch. bot. Ges. 13: 452. 1895. 
. Marre, R.: Sur la cytologie des Hymenomycetes. Comptes Rendus 
131: 121. 9 Jy 1900. 
to. MAIRE, R.: Sur la cytologie des Gasteromycetes.. Comptes Rendied 
_ 131: 1246. 24 D Igoo. -_ 
tr. MASSEE, GEO.:. On the origin of the Basidiomycetes. Journ. Linn. Soc : 
- 34:438. Igoo. : 
12. POIRAULT and RAcIBoRSKI: Sur les noyaux des Urédinées. Comptes — 
Rendus 121: 308. 5 Ag. 1895. Journ. de Bot. 9: 318. 1895. 
13. ROSEN: Studien iib. die Kerne u. die Membranbildung bei Myo : 
ten u. Pilzen. Beitr. z. Biol. d. Pfl. 6: 237. 
14. ROSENVINGE, K.: Sur les noyaux des Hymenomycetes. Ann. d. Sci. Nate 
Bot. VII. 3: 75. 1886. 
15. STRASBURGER, E.: Bot. Praktikum 325. 
16. WAGER: On the nuclear divisions in the Hymenomycetes. Annals of 
Botany 7: 489. 1 : 
17, WAGER: On the presence of centrospheres in Fungi. Annals of Botanyes : 
8: 322. 1894. : 
. RUHLAND, W.: Unt. zu einer Morph. d. Stroma bildenden Sphaeriales. 
Hedwigia 39:1. Ig00. : 
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. 
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EXPLANATION OF PLATE I. : 
All figures were drawn with the aid of the camera lucida, figs. J-4, 7; and 
9 with the Zeiss apoch. objective ap. 140, oc. 8, and 5, 6, 8, and 7¢ with 
oc. 18. 
Hypochnus subtilis. 
F iG: f, Hypa cell showing two nuclei and the characteristic clamp | 
nections. 
FIG. 2. Young basidium and stalk cell, each with two nuclei. 
Fic, 3. Basidium with two younger basidia budding out beneath it. 
Fic. 4. Young basidium with two nuclei; stalk cell with young basidium 
budding out and containing a single nucleus. 
‘Fie. 5, Young basidium with its two nuclei fusing. 
Fic. 6. Later stage in the fusion of the nuclei of the basidium. 
_ Fie. 7. A pair of basidia in one of which nuclear fusion has taken place, 4 
while i in the other it has not yet begun. 
F 1G, 8. First division of the nucleus of the basidium. 
. F1G.9. Two basidia, one with four apore nuclei and o gengraite and “i 
with two nuclei before'fusion. ; 
