RCL een ty hee, ee ee 
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1906] _OVERTON—THECOTHEUS PELLETIERI 485 
9. The exospore is laid down not from the epiplasm but by deposi- 
tion from the outer layer of the sporeplasm. 
to. No evidence has been found to support the theory that the 
ascus is homologous with the sporangia of either the Oomycetes or 
the Phycomycetes. 
11. The formation of the large number of spores is evidently an 
adaptive phenomenon, and does not interfere with the conception that 
the ascus is a spore mother cell. 
UNIVERSITY OF WISCONSIN, 
Madison, Wis. 
LITERATURE CITED. 
ALLEN, C. E., :04, Chromosome reduction in Lilium canadense. Bot. GAZETTE 
37: 464-471. 
» 05, Nuclear division in the pollen mother cells of Lilium canadense. 
Annals of Botany 19: 191-258. 
» 05, Das Verhalten der Kernsubstanzen wihrend der Synapsis in den 
Dollensnnticcedion von Lilium canadense. Jahrb. Wiss. Bot. 42: 72-82. 
BaRANETZKy, J., "72, Entwickelungsgeschichte des Gymnoascus Reessii Bot. 
Zeit. SO: 145 tat 
Barker, P. T. B., :03, The morphology and ee of the ascocarp in 
Monascus, Arial of Botany 1'7: 167-2 
» :03, The development of the ascocarp in Ryparobius. Rept. British 
A. A. S., Southport, 849-850. 
, 04, Further observations on the ascocarp of Ryparobius. Rept. British 
A. A. S., Cambridge, 825-826. 
Baukr, H., 77, Zur Entwickelungsgeschichte der Ascomyceten. Bot. Zeit. 
35: 314-326. 
Baur, E., ’98, Zur Frage nach der Sexualitat der Collemaceen. Ber. Deutsch. 
Bot. Geasile 16: 363-367. 
, :01, Die Anlage und Entwickelung einiger Flechtenapothecien. Flora 
88: 319-332. 
~———, :04, Untersuchungen iiber die Entwickelungsgeschichte der Flechten- 
meer Se Bot. Zeit. 62:21-44. 
Bercus, J., :04 04, :05, La formation des chromosomes hétérotypiques dans la 
Sporogénése végétale. I. Depuis le spireéme jusqu’aux chromosomes miars. 
La Cellule 21: 173-188. II. Depuis la sporogonie jusqu’au spiréme définitif 
dans la microsporogénése de l’ Allium fistulosum. Idem 383-384. Til. La 
‘Microsporogénése de Convallaria majalis. Idem 22:43-49. IV. La micro- 
sporogénése de Drosera rotundifolia, Narthecium ossifragum, et Helleborus 
joetidus. Idem 141-160 
