THELOTEEMACEAE. 



543 



2. Bilimbia aurata Riddle, sp. nov. 



Thallus crustaeeus uniformis effusus haud limitatus, e flavo intense aures- 

 cens, tenuis leprosus laxe eontextus. Gonidia cystococeoidea. Apothecia minu- 

 tissima, 0.1-0.15 mm. lata, sat elevata rotundata regularia eeracea, disco 

 aurantiaco, primum piano margine tenuissime pallidiore subleproso, mox con- 

 vexo margine exeluso ; epithecio luteseente, hymenio et hypotheeio incolore. 

 Asci elavati, 8-spori. Sporae incolores fusiformes apicibus rotundatis aut 

 altero apiee subacute-, 4doculares, loculis cylindricis aequalibus, 10-12 X3(i. 



On bark. Farringdon Road, New Providence (Elizabeth G. Britten, August, 1904, 

 821, type). The following sterile specimens appear to belong here also: on dead 

 Suriana, Andros, at Barton Creek (Brace, 5297) ; on dead wood, Crooked Island, at 

 Gun Bluff (Brace, J,693). Also, Palm Beach. Florida (R. Thaxter). 



The sterile specimens are similar to the Lepraria flava of the older authors, 

 although brighter and more golden. But the fertile specimen has abundant apothecia, 

 which certainly belong to the thallus in question. The species is a very distinct one. 



3. Bilimbia molybditis (Tuck.) Eiddle. 



Biatora molybditis Tuck. Syn. N. A. Lich. 2: 34. 1888. 

 On bark, New Providence : Florida. 



4. BACIDIA DeNot. 



Apothecia pallid to flesh-color. 

 Apothecia reddish-brown to black. 



Apothecia persistently brown. 



Apothecia soon becoming black. 



1. B. medialis. 



2. B. fuscorubella. 



3. B. atroyrisea. 



1. Bacidia medialis (Tuck.) Eiddle. 



Lecidea medialis Tuck, apud Xyl. Ann. Sci. Nat. IV: 19: 346. 



1863. 



Biatora medialis Tuck. Syn. N. A. Lich. 2: 132. 1888. 



On bark, New Providence : Florida ; Texas ; Cuba ; Nicaragua ; Brazil. 



2. Bacidia fuscorubella (Hoffm.) Arnold, Flora 54: 55. 1871. 



Terrucaria fuscorubella Hoffm. Deutsch. Fl. 2: 175. 1795. 

 Biatora fuscorubella Tuck. Syn. N. A. Lich. 2: 43. 1888. 



On bark, New Providence : widely distributed in the northern hemisphere. 



3. Bacidia atrogrisea (Delise) Arnold, Flora 41: 505. 1858. 



Biatora atrogrisea Delise apud Hepp, Fl. Eur. 26. 1853. 

 Lecidea luteola f. endoleuca Nyl. Bot. Xotis. (1853) 98. 

 Bacidia endoleuca Kickx, Fl. Crypt. Fland. 1: 261. 1867. 



On bark, New Providence, at Maidenhead Coppice : widely distributed in North 

 America and Europe. 



Family 8. THELOTREMACEAE. 



Paraphyses branched and anastomosing. 

 Paraphyses simple and free. 



Spores plurilocular, colorless. 

 Spores muriform-multilocular. 

 Spores colorless. 

 Spores brown. 



1. Gyrostomum. 



2. Ocellularia. 



3. Thelotrema. 



4. Leptotrcma. 



1. GYROSTOMUM Fr. 



1. Gyrostomum scyphuliferum (Ach.) Fr. Syst. Orb. Veg. 268. 1825. 

 Lecidea scuphulifera Ach. Synops. Lich. 27. 1814. 



On bark. New Providence : widely distributed in tropical regions of both hemi- 

 spheres. 



