1(5G REV. J. M. CEOMBIE OS LICHENS 



thus made I have been kindly assisted by Dr. Nylander, to whom 

 I am indebted for the following diagnoses of the new species 

 amongst them. Most of these I have recently briefly recorded 

 in the i Journal of Botany,' v. pp. 18-21. 



Family BYSSACEI. 



Sirosiphon ? Infertile, and otherwise with thallus probably 



not fully developed. Indeterminable. 



Family COLLEMACEI. 



COLLEMA PULPOSUM, Var. TENAX, Ach. 



On the bare ground, very sparingly. 



Leptogium tremelloides (L.), Ach. 

 Amongst mosses on rocks ; fertile. 



L. (Stephanophoron) phyllocarpum (Pers.) 

 On the trunks of trees ; barren. 



Family LICIIENACEI. 

 Tribe Cladoniei. 



Cladoxia fimbriata, Hffm. 



On the ground, sparingly, but fertile. 



* 



F. SUBCORNUTA, Nj/L 



On the ground with the type, but barren. 



C. furcata, Hffm. 



Amongst mosses on the ground ; small and infertile. 



■ 



Cladia aggregata (SlV.). 



On the ground ; young and sterile. 



Tribe Sipiiulei. 



SlPHULA TABULARIS (Thunb.). 



On the ground near the summit; very sparingly gathered. 



Tribe Usneej. 



USNEA FLORIDA, Ach. 



On rocks; infertile. 



The specimens are more or less readily referable to the state 

 called rubiginea (Mich.), whence U. rubiginea, Mass. Lich. Cap. 

 p. 45, t. viii. f. 23-26, ut propria species ! 



U. LONGISSIMA, Ach. 



On trees : infertile, and not very typical fragmentary specimens. 



