- 



DILLENIUS's ' HIST0EIA MUSCO^UM.' 565 



in Trans. Linn. Soc. The specimens of both in hb. Dill, are 

 sufficiently typical. 



F. 16. Lichenoides crustaceum et leprosum, scutellis subfuscis, 

 p. 134. A, B=Lecanora stjbfusca (£.). The specimens are 

 fairly characteristic, the thalline margin in A being entire and in 

 B somewhat crenulated. There are also in hb. Dill, a specimen 

 of L. sabfusca, var. coilocarpa, Ach. (saxicole), and a fragment of 

 Lecanora ferruginea (Huds.), referred to in the text as having the 

 colour of the apothecia " rufus vel ferrugineus." 



F. 17. Lichenoides crustosum, orbiculare, incanum, p. 135. A 

 Lecidea canes cens (DcJcs.). Sterile, of which there are three 

 specimens (muricole). Rightly identified by Dickson and subse- 

 quent authors. B= Lecanora galactina, Ach., as indicated by 

 T. & B. in L. Br. p. 65, although referred by Fries to JParmelia 

 circinata. The specimen is broken np into a number of mere 



fragments. 



F. 18. Lichenoides crustosum, orbiculi3 et scutellis flavis, 



p. 136. A, C = Placodiu:m mtjroeu]vi (JBffin.). There are several 



specimens in hb. Dill., some of which are fertile. Referred by 



Hudson and others to Lichen candelarius, but rightly determined 



by Acharius in L. U. p. 433* B=Lecanora citrina, Ach. 



Sufficiently typical, and fertile. Along with this there is also a 



sterile specimen of Lecanora candelaria, Ach, 



Order II. Foliose species. 



Series I. Gelatinous species, tuberculose and scutellate. 



Tab. XIX., Dill. Hist. Muse. 

 [F. 19. Lichenoides maritimurn gelatinosum crassum, intestino- 



rum gyros referens, p. 137,=Biyulakia tltcata, Carmich., Harv. 

 in HooJc. Br. Fl. ii. p. 396. Erroneously supposed by Dickson 

 to be a lichen, and as such named by him Lichen corrugatus in 

 Crypt. Fasc. iv. p. 26, and so referred by other authors to the 

 genus Collerna.'] 



F. 20. Lichenoides gelatinosum membranaceum tenue nigricans, 

 p. 138,= Collem:a nigbescens (Huds.). Fertile. Along with it 

 is also a sterile fragment of C. Jlaccidum. 



[F. 21. Lichenoides gelatinosum tenue reticulatum, p. 138. 

 Although doubtfully referred to Collema in Ach. Meth. p. 247, 

 s. n. Parmelia sagenalis, and to Leptogium in Kphb. Gesch. Litt. 



