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stalk about 0.16 mm. long, the tube proper measuring about 0.56 mm. ; the para- 

 physes are a little longer and thread-shaped. One is left uncertain whether 

 they are yellowish, as they should be for T. megapolitana, or not; they appear 

 •to be hyaline. 



TiMMiA Megapolitana Hedw. 



Figs. I and 2, sections through the lower and upper part of the leaf base. 

 Fig. 3, section through the costa of the lamina. 



Figs. 4 and 5. areolation of lower and upper parts of the leaf margin respectively, showing 

 ■diminished size of teeth toward base. 



(Drawings made by Edward B. Chamberlain from La Moille plants.) 



The capsule, peristome, and spores have not yet been considered, Lim- 

 pricht's description emphasizes also that the calyptra is fugacious, and does not 

 remain attached to the seta; in this Minnesota plant it does remain attached. 

 Two other characters of the leaf, however, agree with Limpricht's descriptions: 



