176 Hircucock: TOLYPELLA LONGICOMA IN CayuGA LAKE 
Nevertheless, the usual lignified membrane forms, and perhaps 
cultures in glass would make it possible to follow the develop- 
ment of the spores after fertilization, although my own efforts 
in that direction have not succeeded. The only examples of 
mature spores I have found are two germinated spores on one 
of my herbarium sheets marked ‘‘protonemal growth and spore 
cases,’’ June 26, 1921. These date back to the year before and 
were still connected with the protonemas and plants developed 
therefrom. They were remov and mounted for micro- 
scopical examination and are shown in Fic. 8. 
he author’s measurements of the Cayuga Lake plant may 
be compared with Braun’s measurements of the Columbus plant 
as follows :— 
Author Braun 
Antheridia 0.37-0.44 mm. 0.36 mm. 
Sporophydia 
Length 0.35-0.57 mm. 0.38-0.6 mm. 
Width 0.4 mm. 0.42-0.44 mm, 
Spores 
Length 0.3-0.38 mm. 0.36-0.4 mm. 
Width 0.3-0.34 mm. 0.3-0.32 mm. 
Crown 
Height 35 ou 
Width 85 u 
IrHaca, New York 
LITERATURE CITED 
1. Braun, A. Fragmente einer Monographie der Characeen. 
bhandl. Kénigl. Akad. Wiss. Berlin 1882: 1-211. $l. 
oar fee Bek, be 
2. Allen, T. F. Notes on the American species of Tolypella. 
Bull. Torrey Club 10: Iog-117. pl. 37-42. 1883. 
3. Migula, W. Die Characeen. Rakenhorst’s Kryptogamen- 
flora 5. 1900. 
Explanation of plate 8 
TOLYPELLA LONGICOMA A. Br. 
Fic P’ant, seeing size. 
Fic Fertile lea 
Fic Fertile lea 
Enlarged Hels of fertile leaves. 
Fruiting heads. 
Sporophydia, neck-cells enlarged. 
Two sporophydia and dissected out young spore, 
Germinated spores (from dried specimen), 
‘ry 
bot 
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