SYNOPSIS OF ORDERS AND GENERA. 47 



Genus 2. Dic/tclyma. Sporangium sessile or subsessile ; 

 veil cucullate. 



ORDER II. CEYPTOTHECIL 



Peristome single or double ; veil mitriform ; stems cylin- 

 drical; leaves imbricated. 



Genus 3. Cryphcea. Sporangium immersed ; veil small ; 

 peristome double. 



ORDER III. HOOKEEEI. 



Sporangium horizontally cernuous, succulent; peristome 

 double ; veil mitriform ; stem mostly flattened ; leaf-cells 

 mostly large. 



Genus 4. Daltonia. Sporangium suberect ; veil fringed ; 

 leaves spreading, cells small. 



Genus 5. Hookeria. Sporangium cernuous; inner peri- 

 stome divided halfway down into sixteen processes, without 

 intermediate cilia; veil not fringed; leaves flattened, cells 

 large. 



ORDER IV. NECKEEEI. 



Fruitstalk mostly short ; peristome double ; veil cucullate ; 

 leaves mostly flattened ; stem more or less pinnate. 



Genus G. Neckera. Sporangium erect, immersed, or ex- 

 serted; veil large; inner peristome divided almost to the 

 base ; leaves mostly undulated. 



Genus 7. Homalia. Fruitstalk elongated ; inner peristome 

 a membrane divided into sixteen keeled processes without in- 

 termediate cilia ; leaves not undulated. 



ORDER V. HTPNEL 

 Sporangium cernuous ; fruitstalk elongated ; veil cucullate ; 



