14 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8l 



acuta, cuspidata, marginibus usque ad medium folii anguste revolutis, 

 superne denticulatis, costa basi 120 /x lata, sensim attenuata, in cus- 

 pidem brevem excurrente, cellulis mediis hexagonis, 50-60 fx longis, 

 20-24 /ji latis, parietibus tenuibus, basilaribus breviter rectangularibus, 

 marginalibus (e 2-3-ser.) linearibus, concoloribus, baud incrassatis, 

 limbum vix distinctum efformantibus. Caetera desunt. 



In its size and tbe dimensions of the leaves this is to be compared 

 with B. andicola Hook. ; it may be distinguished from that species by 

 the more acute-acuminate, longer-cuspidate leaves, the cells being 

 twice as long and also wider, and above all by the hardly differentiated 



Fig. 5. — Bryuin subelimbatum Then i, leaves; 2, apical cells near point a; 

 3, marginal cells toward point b ; 4, median cells at point c ; 5, basal areolation. 



border, composed toward the middle of the leaf of 2 or 3 linear cells 

 with walls as thin as those of the adjacent cells and entirely disappear- 

 ing toward the apex. 



ORTHOTRICHACEAE 



ZYGODON SPATULAEFOLIUS Besch. Prodr. Bryol. Mex. 43. 1871 



Valle de Mexico: Desierto (Bro. Amahle 1252). 

 Mr. N. Malta considers this species identical with Z. obtusifoliiis 

 Hook. 



ZYGODON OLIGODONTUS Card. Rev. Bryol. 36: 107. 1909 

 Valle de Mexico : Salazar, upon a tree {Bro. Aniable 1235 in part). 



