392 



Gametophyte an exceedingly minute mostly simple, fleshy 

 stem, often less than a millimeter long ; leaves imbricate, ovate- 

 orbicular, usually narrower than the stem, bifid with an acutish 

 sinus ; underleaves lanceolate-ovate, entire, often apparent only 

 near the ends of the stems; perianth terminal on ascending stems, 

 0.5 mm. or less long, oval or somewhat obovate, plicate and trun- 

 cate at the mouth. Sporophyte an oval capsule on a seta scarcely 

 longer than the perianth. 



Among mosses on rotten wood, New Jersey and Ohio [fide 

 Austin) ; also Belleville, Ontario (Macoun). Not often collected 

 but likely to be overlooked by collectors on account of its almost 

 microscopic size. It was distributed bySullivant: Muse. Alleg. 

 239 {z.% Juiigermannia divaricata); this number forms the type ; it 

 was also distributed by Austin : Hep. Bor. Am. 50. 



13. Cephalozia minima Aust.; Pearson, List Can. Hep. \\. pi. 6. 



1890. 



Gametophyte a minute dark green, usually simple leafy axis; 

 leaves about the width of the stem, obovate or subquadrate, bifid 

 one-third their length, with acute divisions, the margins entire ; 

 leaf cells 4-6-sided, about 16^^/ in diameter; underleaves present, 

 the lower entire and subulate, the upper larger and bifid: dioicous; 

 perianth acrocarpus, oblong-oval, with rather wide sub-entire 

 mouth ; involucral leaves 3 pairs, larger than the ordinary stem- 

 leaves, subquadrate, bifid one-third to one-half their length, spinu- 

 lose-dentate ; antheridia on short branches. Sporophyte not seen. 



On rotten logs, Belleville, Ontario (Macoun) ; known only 



from the type specimen. 



14. Cephalozia Turneri (Hook.) Lindb. Acta Soc. Sci. Fenn. 



10 : 502. 1875. 



Jungcrjiianjiia Tiirnei'i Ylodk. Brit. Jung. //. 2Q. 1816. 



Gametophyte a prostrate slightly branched leafy stem, 2-5 

 mm. long; leaves approximate, equitant, complicate-bifid half-way 

 to the base, the margin everywhere sharply and unequally serrate- 

 dentate ; underleaves wanting : dioicous or monoicous ; perianth 

 whitish, 0.3-0.5 mm. long, pentagonal-prismatic, the mouth almost 

 closed, obscurely ciliolate ; involucral leaves larger than the ordi- 

 nary stem-leaves, spinose-dentate, bifid with acute divisions. Spo- 

 rophyte and oval capsule on a slender seta; spores dark brown, 

 about 8 n in diameter; elaters dark brown, about 200 /i long, with 

 two close spirals. 



This species was first announced by Mr. M. A. Howe from 



