BUELLIACEAB. 551 



2c. Caloplaca aurantiaca var. diffrdcta (Mass.) Eiddle. 



Callopisma auramtiacum var. diffractum Mass. Monog. Lich. Blast. 73. 

 1853. 



On limestone, New Providence, and Watling's Island, near Cockbum Town : — 

 Italy. 



The Bahama material agrees exactly with the specimen in Massalongo Lich. 

 Exsic. Ital. no. 2J,3. 



Family 16. BUELLIACEAB. 



1. BTJELLIA DeNot. 



Thallus areolate, even, medulla white. 

 Thallus yellow with caustic potash. 



Apothecia black and nudate. 1. B.paraaema. 



Apotheela with an aeruginous bloom. la. B.parasemavar.aeruginascens. 



Thallus red with caustic potash. 2. B. consptrana. 



Thallus verrucoae, the verrueae with a dark red 



medulla. 3. B.sanguinariella. 



1. BueUia parasSma (Aoh.) Koerb. Syst. Lich. Germ. 228. 1855. 



Lecidea parasema Ach. Meth. Lich. 35. 1803. 

 BueUia disciformis Auct. 



On bark. New Providence : — cosmopolitan. 



la. BueUia parasema var. aeniginascens (Nyl.) Muell. Arg. Flora 68: 530. 

 1885. 



Lecidea disciformis var. aeruginascens Nyl. Bull. See. Linn. Norm. II: 2: 

 52. 1868. 



On bark, Ship Channel Cay and Stocking Island, Exuma Chain : — widely dis- 

 tributed in tropical America. 



2. Buellla conspirans (Nyl.) WainiOj Ann. Acad. Soi. Fenn. A: 6': 88. 1915. 



Lecidea conspirans Nyl. Flora 51: 345. 1868. 



Lecidea suh disciformis Leight. Lich. Fl. Brit. 308. 1871. 



BueUia suidisciformis Wainio, Lich. Bres. 1 : 167. 1890. 



On bark, common in many of the islands from New Providence to Long Island : — 

 widely distributed in the warmer regions. 



3. BueUia sanguinariSUa (Nyl.) Wainio, Lich. Br6s. 1: 168. 1890. 



Lecidea sanguinariella Nyl. Ann. Sci. Nat. V: 7: 328. 1867. 



On bark. Crooked Island, at Vauxhall and Jingo Hill: — Cuba; Colombia. 



Family 17. PHYSCIACBAE. ' 



Hypothecium brownish-black. 1. Pyxine. 



Hypothecium colorless. 2. Pliysda. 



1. PYXiNE Fr. 



Apothecia lecanorine at least when young. 



Apothecia persistently lecanorine. 1. P. picta. 



Apothecia soon becoming lecideine. 2. P. Meissneri. 

 Apothecia lecideine from the first. 



Medulla white. 3. P. Cocoes. 



Medulla sulphury. Sa. P. Cocoes var. endoxantha. 



1. Pyxine picta (Sw.) Tuck. Proc. Amer. Acad. 4: 398. 1860. 



Lichen piotus Sw. Prodr. 146. 1788. 

 Physoia picta Nyl. Syn. Lich. 1 : 430. 1858. 



On trees and shrubs, Great Bahama, New Providence, Cat Island, Watling's 

 Island : — ^widely distributed in warmer regions of both hemispheres. 



