LIST OF GENERA 23 



Genus 33. Dictydiaeihalium Rost. (P. 196.) 



34. Enteridium Ehrenb. (P. 197.) 



35. Eeticularia Bull. (P. 198.) 



36. Liceopsis Torrend. (P. 199.) 



Order V. — Lycogalaceae. Sporangia forming an aetha- 

 lium ; pseudo-capillitium consisting of branched colourless 

 tubes. (P. 200.) 



Genus 37. Lycogala Adanson. (P. 200.) 



Subcohort II. — Calonemineae. Capillitium present as a 

 system of uniform or sculptured threads. (P. 204.) 



Order I. — Trichiaceae. Capillitium consisting of tubular 

 threads, which are either free and unbranched (" elaters "), or 

 form a network branching at wide angles ; thickenings in the 

 form of spirals or rings. (P. 204.) b 



Genus 38. Trichia Haller. (P. 205.) 



39. Oligonema Rost. (P. 219.) 



40. Calonema Morgan. (P. 221.) 



41. Hemitrichia Rost. (P. 222.) 



42. Cornuvia Rost. (P. 231.) j 



Order II. — Arcyriaceae. Capillitium a network of tubular 

 threads branching at wide angles and thickened with cogs, 

 half rings (rings in Arcyria annulifera), spines, or warts 

 (capillitium often scanty and of free threads in Perichaena 

 corticalis). (P. 231.) 



Genus 43. Arcyria Wiggers. (P. 232.) 



44. Lachnobolus Fries. (P. 246.) 



45. Perichaena Fries. (P. 247.) 



Order III. — Margaritaceae. Capillitium consisting of 

 solid threads, either coiled and hair-like or nearly straight 

 and attached to the sporangium-wall, simple or branching 

 at acute angles. (P. 254.) 



Genus 46. Margarita Lister. (P. 256.) 



47. Dianema Rex. (P. 257.) 



48. Prototrichia Rost. (P. 260.) 



49. Listerella Jahn. (P. 261.) 



b 2 



