32 
112. Aloina. Peristome contorted. Leaves strongl 
involute above; filaments very numerous; costa very broad 
Stem very short. Pedicel of the capsule long. 
113.  Crossidium. ^ Peristome usually contorted 
Leaves reflexed or flat at the borders, imbricate; filament 
numerous; costa narrow. 
114. Pterygoneuron. Peristome not contorted, mostl 
wanting. Leaves imbricate, not involute; lamellze few 
costa narrow. Monoecious. 
Il. Didymodontec. Peristomial teeth not partite - 
but more or less cleft (or in Pottia entire), with longi 
tudinal line, not contorted but sometimes half-twisted 
basal] tube very saon: Leaves without lamellæ on the 
costa. * 
* Capsule symmetric without distinct neck. ? 
115. Didymodon. Peristomial teeth more or less | 
cleft. Leaves usually papillose, generally broader near 
the base. Habit of Barbula (Eu-Barbula). 
116. Pottia. Peristomial teeth not cleft, often rudi- 
mentary or wanting. Leaves broader above the middle, 
often smooth. Habit of Barbula (Tortula). : 
** Capsule oblique or arcuate with a thick neck 
117. JDermaíodon. Peristomial teeth cleft. Leaves 
papillose, broader above the middle. Habit of Ceratodon. 
Ill. Weisiec. Peristomial teeth without longi 
dinal line, not twisted, generally short and entire (rarely 
cleft), sometimes wanting; basal tube not distinct. Leaves 
. without lamellæ. 
2 118. Weisia. Capsule without neck, generally 
Straight and symmetric. Leaves usually papillose, not 
limbate, not seldom involute above, often crisped when dry. 
IV. Syrrhopodontee. Peristomial teeth without 
: longitudinal line and basal tube, not twisted, short and 
entire. Leaves bilamellate at the borders or limbate 
often with propagula. 
119. Syrrhopodon. Gapoulie straight and symme- 
tric, subcylindrie, narrowed above to «the. month, 4e g 
