58 HANDBOOK OF BRITISH MOSSES. 



Genus 88. Potha. Veil cucullate ; peristome none ; apex 

 of columella falling away with the lid. 



OEDEK XXX. DICRANEL 



Sporangium even orstriate; peristome of sixteen bifid, often 

 trans versely-striate teeth; veil cucullate, entire, or fringed. 



Genus 89. Campylopus. Sporangia mostly aggregate ; 

 fruitstalk curved or geniculate ; veil fringed ; teeth lanceolate ; 

 leaf-cells subquadrate. 



Genus 90. Dicranodontium. Sporangium even ; fruitstalk 

 curved ; veil not fringed ; upper leaf-cells narrow. 



Genus 91. Ceratodon. Sporangium erect, furrowed ; peri- 

 stome of sixteen deeply cloven teeth, connected below by trans- 

 verse processes ; upper leaf-cells minute. 



Genus 92. Trichodon. Fruitstalk flexuous; sporangium 

 even; peristome of sixteen teeth divided to the base; articu- 

 lations nodose ; leaf-cells rectangular. 



Genus 93. Leucobryum. Sporangium striate ; peristome of 

 sixteen bifid trabeculate teeth ; outer leaf-cells perforated. 



Genus 94. Dicranum. Sporangia aggregate or single in 

 the same perichsetium ; teeth sixteen, striate and trabeculate ; 

 upper leaf-cells linear. 



Genus 95. Dicranella. Sporangium mostly cernuous; veil 

 slightly inflated ; peristome regular ; upper leaf-cells oblongo- 

 hexagonal ; stems normally short. 



Genus 96. Dichodontium. Sporangium roundish, without 

 any apophysis ; fruitstalk flexuous ; teeth bi-trifid ; articula- 

 tions crowded, prominent ; upper leaf-cells very minute, quad- 

 rate, papillose. 



Genus 97. Cynodontium. Sporangium oblique or sym- 

 metrical; veil rather large; teeth lanceolate, dilated at the 

 base, cloven, often irregular; upper leaf-cells minute; lower 

 rectangular ; all chlorophyllous. 



