THELOTREMACEAE. 543 



2. Bilim'bia aurata Eiddle, sp. nov. 



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

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

 tissima, 0.1-0.15 mm. lata, sat elevata rotundata regularia ceraceaj diseo 

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

 vexo margine excluso; epitheeio lutescente, hymenio et hypotheoio incolore. 

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

 altero apice subaouto, 4-looulares, loeulis eylindricis aequalibus, 10-12 X 3|ii. 



On bark, B'arrlngaon Road, New Providence (Elizabeth O. Britton, August, 190i, 

 221f type). Tile 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,e93). Also, Palm Beacb, Florida (B. 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 molylditis Tuck. Syn. N. A. Lieh. 2: 34. 1888. 

 On bark, New Providence : — Florida. 



4. BACIDIA DeNot. 



Apothecia pallid to flesh-color. 1. B. medialis. 

 Apothecia reddish-brown to black. 



Apothecia persistently brown. 2. B. fuscorubella. 



Apothecia soon becoming black. 3. B. atrogrisea. 



1. Bacidia media,Iis (Tuck.) Eiddle. 



Lecidea medialis Tuck, apud Nyl. Ann. Sci. Nat. IV: 19: 346. 1863. 



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



On bark, N«w Providence : — Florida ; Texas ; Cuba ; Nicaragua ; Brazil. 



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



Verrucaria fuscorubella Hoffm. Deutsch. Yi. 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. Notis. (1853) 98. 

 Bacidia endoleuca Kiekx, 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, 1. Q-yrostomum. 



Paraphyses simple and free. „ „ „ , . 



Spores plurilocular, colorless. , 2. OceUulana^ 

 Spores muriform-multilocular. 



Spores colorless. 3. Thelotrema. 



Spores brown. 4. Leptotrema. 



1. GYROSTOMTJM Fr. 

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

 Lecidea scyphulifera Act. Synops. Lich. 27. 1814. 



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

 spheres. 



