218 _ WILLIAMS: THE GENUS DESMATODON 
10. Desmatodon stomatodontus (Card.) comb. nov. 
Hyophila stomatodonta Card. Rev. Bryol. 36: 76. 1909. 
Dioicous: plants with slender stems 4-8 mm. long; lower leaves 
minute, the larger crowded into a rosulate tuft at the apex of the 
stem, somewhat spatulate-oblong, flexuous with strongly inrolled 
margins when dry, more or less widely spreading when moist, 
about 1.5 mm. long, mostly obtuse and scarcely apiculate, the mar- 
gins finely crenulate to below the middle; costa percurrent, 404 
wide a little above the base, in cross-section showing two large 
guide-cells, three to four rather large cells above them and below 
a large stereid band with the outer cells differentiated; cells in 
upper part of leaf distinct, roundish to hexagonal, mamillose on 
both sides, 6-8 u in diameter, in the lower leaf, square to short- 
rectangular and scarcely paler than above; one or two inner perl- 
chaetial leaves sometimes lanceolate, acute, with the costa scarcely 
percurrent; seta about 5 mm. long; capsule erect, cylindric, about 
1.5 mm. long without lid, the exothecal cells mostly irregularly 
elongate, with thin walls, the median cells about 20 » wide by 40- 
50 u long; lid about one-half the length of the capsule, nearly erect, 
with cells a little above its base elongate in nearly erect rows; an- 
nulus large; peristome reddish brown, papillose, fragile, irregularly 
divided from some distance above the rim into slender forks ex- 
tending about 150 u above the rim; spores smooth, pale, 7-8 # 1m 
diameter. [Fic. 10.| 
TYPE LOCALITY: State of Jalisco, Mexico. 
DisTRIBUTION: known only from type locality. 
11. DESMATODON CERNUUS (Hueb.) B.S.G. Bryol. Eur. (18-20): 
: Desmatodon 8. 1843 
Dermatodon cernuus Hueb. Musc. Germ. 117. 1833. : 
Cynodontium latifolium Schwaegr. Suppl. 1!: 110. 1817 (not Di- 
cranum latifolium Hedw. Desc. 1: 89. 1787). 
Desmatodon camptothecius Kindb.; Macoun, Cat. Can. PI. 6: 48. : 
1892. 
Dermatodon camptothecius Kindb. Eur. & N. Am. Bryin. 2: 283+ 
1897. : 
Autoicous, the male flower just below the perichaetium, com- 
posed of several club-shaped, often long-stalked antheridia, with = 
rather numerous, slightly club-shaped paraphyses, enclosed by — 
two ovate-lanceolate, costate leaves about I mm. long, ki e 
entire or with one or two rather large teeth at the acute apeX> 
plants in compact cushions with mostly simple stems from 3-4 = 
