ERYACEJE. 35 



Calyptra smootli. Peristome double. Teeth 

 narrowly lanceolate-subulate; segments 

 shorter than the teeth, subulate; basilar 

 membrane none. 111. Antitrichia. 



Tribe XIX. HOOKERTE^. Plants small, soft, hypnoid; areolation 

 large. Calyptra conical-mitrate. Peristome double. 



Leaves bicostate, often margined, more or less 



distinctly serrate. 112. Hookeria. 



Leaves plane, large, very obtuse, not costate; 



areolation very large. 113. Pterygophyllum. 



Tribe XX. FABRONIE^. Plants very small. Leaves thin, delicate, 

 ciliate-dentate or entire. Capsule pyriform, with a distinct coUum. 

 Calyptra cucullate, split on one side. Peristome simple or none. 



Leaves delicate, not costate, dentate-ciliate. 



Calyptra thin. 114. Fabronia. 



Plants more robust. Leaves entire, thinly 



costate to the middle. Peristome double; 



segments shorter than the teeth. 115. Anacamptodon. 



Plants very small. Leaves squarrose when 



moist, entire. Peristome simple. 116. Habrodon. 



Plants minute. Leaves minutely serrulate 



above. Capsule thin, constricted under the 



orifice. Teeth of the simple peristome very 



irregular. 117. Clasmatodon. 



Tribe XXL LESKEACE^. Primary stems creeping. Leaves soft, 

 areolation minute, hexagonal, papillose and chlorophyllose above, 

 hexagonal-rectangular below. Capsule symmetrical, erect or curved. 

 Peristome double; teeth linear-lanceolate, subulate; segments 

 shorter than the teeth; cilia none or rudimentary, rarely perfect. 



Plants glaucous yellow. Leaves pellucid; 

 cells conspicuously papillose. Capsule cy- 

 lindrical, erect; membrane broad, carinate, 

 without segments. 118. Thelia. 



Branches julaceous. Leaves glaucous green, 

 closely imbricate. Capsule suberect, long- 

 pedicellate, inflated at the coUum. Peri- 

 stome double, perfect. 119. Myurella. 



Plants small. Leaves soft, costate, papillose 

 on both faces (except in one species). Cap- 

 sule oblong, erect or subarcuate, thin. Seg- 

 ments of the peristome narrow, linear; cilia 

 none. 120. Leskea. 



Leaves with a minute chlorophyllose puncti- 

 form obscure areolation, papillose on both 

 faces. Capsule erect, cylindrical-oblong, 

 regular. Teeth pale; segments short, nar- 

 rowly linear. 121. Anomodon. 



Tribe XXIL ORTHOTHECIE^. Plants in wide yellow mats. Leaves 

 smooth; areolation narrowly rhomboidal or linear, quadrate at the 

 basal angles. Capsule erect, symmetrical. Peristome double. 



