224 The Botanical Gazette. [May, 
ALG: Surirella calcarata, Biitschli, (2); Lauterborn, (11). 
Pinnularia nobilis Biitschli, (3). 
Spirogyra sp., de Wildeman, (18). 
Chara fetida, Schottlainder, (14). 
Sphacelaria scoparia, Strasburger, (15); Humph- 
rey, (9). 
FUNGI: Agaricus galericulatus, Wager, (17). 
BRYOPHYTA: Marchantia polymorpha, Schottlinder, (14). 
Pellia epiphylla, Farmer and Reeves, (5). 
PTERIDOPHYTA: Gymnogramme sp., Schottlinder, (14.) 
Asplenium sp., Guignard, 1891. 
Polypodium sp., Guignard, 1891. 
'smunda regalis, Humphrey, 
Equisetum limosum, de Wildeman, (18). 
Psilotum triquetrum, Humphrey, (9); Guignard, (7). 
Isoetes sp., Guignard, 1891. 
GYMNOSPERMAE: Ceratozamia longifolia, Humphrey, (9)- 
ANGIOSPERMAE: Liliacee (Lilium, Fritillaria, Allium), 
Guignard, 1891; Schaffner, (13). 
Amaryllidacee, Orchidacee, etc. Guignard, 1891. 
Tradescantia sp., Guignard, 1891. 
Vicia Faba, Schaffner (13) 
The fact that they have been seen chiefly in the reproduc- 
tive cells is due plainly to the greater size and better devel- 
opment of most important structures in such cells. But 
there is no reason to doubt their occurrence in purely vege- 
tative cells also. Their minute size and the difficulty with 
which they take up stains makes their recognition in most 
plants dependent on very favorable conditions for observa- 
tion. But in some alge, including some diatoms, accord- 
ing to Bitschli, they are much more easily recognizable, even 
in the living cell. 
