20 M. FOSLIE. [1900 



33. L. congestum Fosl. 



34. L. pallescens Fosl 



35. L. byssoides (Lam.) Fosl. 



36. L. Bamleri Heydr. 



37. L. elegans Fosl. (incl. Lithoth. Margaritae Har.?) 



f. angulata Fosl. 

 f. complanata Fosl. 



38. L. tortuosum (Esp.) Fosl. 



f.? cristata (Menegh.) Fosl. 



f. undulosa (Bory) Fosl. (Tenarea undulosa Bory). 



f. crassa (Lloyd) Hauck. 



f. decumbens Fosl. 



39. L. Carpophylli Heydr. 



40. L. Marlothii Heydr. 



41. L. Yendoi Fosl. 



42. L. papillosura (Zan.) Fosl. 



43. L. subtenellum Fosl. 



44. L. zostericolum Fosl. 



f. tenuis Fosl. 

 f. mediocris Fosl. 



Gen. Melobesia Lamour: emend. 



Conceptacles of sporangia superficial or slightly immersed, 

 conical or hemispheric-conical, with an apical pore; sporangia with 

 short foot arising from the almost plain disc, the latter connected 

 with the roof by delicate filaments soon disappearing. 



Conceptacles of cystocarps superficial, conical or hemispheric- 

 conical (smaller than the preceding), with an apical pore; cårpo- 

 spores arising around the periphery of the „conjugation cell", the 

 central parts of the latter with a bundle of short paranemata. 



Subgen. I. Eumelobesia Fosl. 

 Thallus composed of a single layer of cells except in the 

 neighbourhood of the conceptacles. 

 1. M. farinosa Lamour. (incl. M. inæquilaterata Solms? M. verru- 

 cata auet. ex parte ; Hapalidium coccineum Crn. ex parte). 



