150 A MANUAL OF ilOSSES 



stricted below the mouth when dry and empty, sometimes un- 

 symmetrically vip-curved ; operculum broad, convex-mamillate ; 

 annulus large, revoluble ; mouth deep chestnut, pellucid ; peri- 

 stome teeth linear-triangular, yellowish-pellucid below, sub- 

 hyaline and papillose above, strongly trabeculate, lamellate, 

 divisural zig-zag ; basal membrane of inner peristome half the 

 height of teeth, the segments a little shorter, hyaline, carinate- 

 ly split, cilia 3, strongly appendiculate ; spores yellowish, .014- 

 .016 mm., minutely "punctulate" or granular : synoicous : ma- 

 ture in July. 



On wet soil, rocks, or decaying wood, in swamps or other 

 wet places. Cosmopolitan; in our region more common in the 

 mountains and in the swampy glaciated region towards the 

 northwestern corner of Pennsylvania. 



Allegheny : Wild wood, June 11, 1908. O. E. J. 

 Cambria : Flinton, July 23, 1908, and St. Lawrence 



July 24, 1908. O. E. J. (Figured). 

 Center : Scotia. Barrens near town, September 22, 



1909. O. E. J. 

 Crawford : Pymatuning Swamp, Linesville, June 12, 



1908, and Hartstown, May 29-31, 1909. 



O. E. J. 

 Erie : Presaue Isle, May 8-9 and September 20- 



22, 1906. O. E. J. 

 Fayette : Ohio Pyle, September 1-3, 1906, O. E. J 



and G. K. J., and June 14, 1908. O. E. J. 

 Indiana : James (Porter's Catalogue). 



McKean : Quintuple, June 13, 1897. D. A. P.. 



4. Bryum afifine (Bridel) Lindberg. 

 (B. cnspidatuin Schimper). 

 (Plate XIX) 

 Rather densely cespitose, becoming dark green : stem 

 short, in ours usually 1-2 cm., occasionally longer, with slender 

 innovations, somewhat matted with a brownish tomentum, 

 dark brown ; leaves rather numerous, somewhat clasping and 

 shortly decurrent, the margins revolute to near the apex where 

 the leaves are slenderly acuminate and more or less serrulate, 

 the leaves ranging from oblong-lanceolate below to elongate 

 ovate-lanceolate abo\e and on the branches ; when dry the 

 leaves are moderately shrunken and twisted ; costa strong, 

 reddish, long excurrent; leaf-cells rhomboid-hexagonal above, 

 to thin-walled, reddish, and more or less inflated-rectangular at 

 the base, the marginal in two to five rows of linear-prosenchy- 

 matous more or less yellowish-pellucid cells forming a strongly 

 marked border : seta slender, flexuous, lustrous-castaneous., 

 about 2-4.5 cm. in height ; capsule 3-4 mm. long, elongate 



