DILLENITJS S ' HIST0RIA MTTSCORUM.' 655 



F. 6. TTsnea barbata, loris tenuibus fibrosis, p. 63,=UstfEA 

 dasypoga {Ach.). The specimen is sterile, but presents a few 

 " cephalodia." Correctly identified by Fries, L. E. p. 18 ; but by 

 most others referred to the Lichen larlatus (L.). 



F. 7. TTsnea jubata nigricans, p. 64, =Alectorta jubata (pro- 

 lixa), Ach. Though sterile and sparingly sorediate, the specimen 

 is quite typical. 



Tab. XIII., Dill. Hist. Muse. 



F. 8. TTsnea lanae nigrse instar, saxis adherens, p. 66,=Alecto- 

 ria BICOLOR {JEhrh.). There is only a small sterile specimen in 

 lib. Dill., of which the figure given is by no means good, which 

 has no doubt led to its being erroneously supposed by authors to 

 represent Parmelia lanata (L.). 



F. 9. TTsnea csespitosa exilis capillacea atra, p. 66, = Parmelia 

 lanata (-£.)• Only a few sterile fragments are present. The 

 figure is not at all characteristic, and certainly bears a kind of re- 

 semblance to JEphebe pubescens, for which it has been mistaken. 

 This latter, however, is not a Dillenian species. 



P. 10. TTsnea rigida, horsum vorsum extensa, p. 66, = Alecto- 

 ria jubata, var. chaltbeiformis {L.). Infertile. Only a few 

 filaments of the specimen are figured. 



[P. 11. TTsnea nigra, setaD equinse facie, parum ramosa, p. 67. 

 A=Thamis'om:tces patagoxicus, Cromb. As suggested by Acha- 

 rius in L. U. p. 589, this is evidently a distinct species. B 

 TnAMNOMTCES setiformis {Both). Fertile. Both are Fungi.] 



F. 12. TTsnea vulgatissiina tenuior et brevior, sine orbiculis, 

 p. 67. A=Usnea hirta (_£.). Infertile. B = U. hirta f. 

 minor. Sterile. This state, however, occurs fertile in Britain. 

 C=U. hirta f. sorediata. Sterile. D = U. Florida (L.). 

 Atypical and stunted old sorediate states, of which there are two 

 specimens in hb. Dill. This has not been distinguished by authors 



from TT. hirta. 



F. 13. TTsnea vulgatissima tenuior et brevior cum orbiculis, 

 p. 69. A = Usnea Florida (£.)• Typical and fertile. B, 0, 



D = U. striqosa, Ach. Different states, of which there are 

 several poor specimens, some of them scarcely distinguishable 

 from states of TT.Jlorida, to which all the figures have been re- 

 ferred. 



F. 14. TTsnea ceratoides candicans, glabra et odorata, p. 71, 

 Kamallna. arabum {Ach.). Infertile. The specimen figured is 



