OF WESTERN PENNSYLVANIA 227 



annulus of 2 or 3 series ; peristome-teeth few-articulate above, 

 deeply inserted, lance-linear, rather short, bordered, not trans^ 

 versely striolate but irregularly papillose, dorsal lamellse and 

 divisural strongly marked; segments nearly as long as teeth, 

 narrowly linear-carinate, free from teeth, arising from a very 

 narrow basal membrane, smooth, cilia none; operculum conic- 

 rostrate, usually somewhat oblique, about O.S-0.8 mm. long; 

 calyptra small, enclosing only about half of the capsule ; spores 

 yellowish-incrassate, about .014-.018 mm. in diameter, minute- 

 ly roughened, mature in late summer. Variable. 



On rotten logs, earth, rocks, roots of trees, etc. ; from New 

 England to Minnesota and south to the Gulf States. Common 

 in our region. 



Allegheny : Guyasuta Hollow, October 25, 1908, and 

 Keown, November 14, 1909. O. E. J. 



Crawford : Linesville, May 12, 1908. O. E. J. 



Erie : Presque Isle, September 20-22, 1906. O. 



E.J. 



Fayette : Ohio Pyle, September 1-3, 1906,' and 



Cheat Haven, September 1-3, 1910. O. E. 

 J. and G. K. J. 



Huntingdon : Huntingdon, July 20, 1908. O. E. J. 



Indiana : T. P. James. (Porter's Catalogue). 



McKean : Shepherd's Run, August 17, 1895. D. A. B. 



Washington : Charleroi, October 13, 1906. O. E. J. 

 and G. K. J. (Figured). 



3a. Entodon seductrix variety minor (Austin) Grout. 



Differs from the type in size, being only about one-half 

 to two-thirds as large, usually darker in color: capsule about 

 3^:1, about 2-2.5 mm. long; spores usually about .010-015 

 mm. in diameter. 



Allegheny : Bark of decaying log, mixed oak and pine 



woods, Dutil Church, Douthett, Decem- 

 ber 29, 1908. O. E. J. 



3. PLATYCYRIUM Bryologia Europrea. 



Dioicous, rather robust, flatly cespitose, green to golden 

 or brownish-green, lustrous : stem elongate, creeping, ventrally 

 densely radiculose, thickly-leaved and unsymmetrically pin- 

 nate; branches julaceous, mostly short, simple; leaves imbricate 

 when dry, moist spreading, decurrent, non-plicate, ovate to 

 oblong-lanceolate, sharply acute, smooth, margins revolute; 

 ecostate ; apical cells rhomboid, linear below, alar quite large, 

 numerous, quadrate; seta 8-15 mm., sometimes 20 mm., 

 smooth, castaneous ; capsule erect, symmetric or slightly 

 arcuate, narrowly oblong to almost cylindric; annulus broad, 

 pluri-seriate, revoluble entire or sometimes in pieces; peris- 



