274 PROCEEDINGS OF THE AMERICAN ACADEMY 



for specific distinction.* And, if I am not so far mistaken, the spores, 

 in which a certain degree of variableness in dimensions is also pre- 

 sumable, seem hardly sufficient alone. 



Lecidea (Biatora) oncodes, sp. nov. : thallo granuhs minutis 

 dein subconfluentibus rimoso viridi-cinerascente hypotliallo fuscescente 

 evanido ; apotheciis mediocribus appressis, disco mox convexo rufo- 

 fusco hypothecio nigricante imposito margine tenui pallidiori flexuoso, 

 prolifero-difformibusve majusculis in soredia farinacea sa^pe fatiscenti- 

 bus. Sp. octonas, parva3, incolores, simplices, oblongfE, diam. 4-6° 

 longiores. Paraphyses conglutinatte. On trunks in the mountains of 

 Cuba, Mr. Wright. (Lich. Cub. n, 187.) Remarkable for the fre- 

 quent transformation of the apothecia into soredia. 



Lecidea (Biatora) ORPHNiEA, sp. nov. : thallo e granulis minutis 

 dein coalescentibus subimbricatis rufo-fusceseentibus hypothallo tenui 

 fuscescenti-pallido ; apotheciis minutis sessilibus disco plano-convexo 

 nigro-fusco intus nigricante margine obscuriore evanido demum pro- 

 liferis. Sp. in thecis clavatis 10 - 15-sporis, parvae, incolores, oblongfe, 

 diam. 2J-5° longiores. Paraphyses mox distinctse. On trunkp in 

 the island of Cuba, 3Ir. Wright. Comparable with L. furfuracea^ 

 Pers., Nyl. (Lindig. n. 840), but apparently quite distinct. 



Lecidea (Biatora) furfurosa, sp. nov. : thallo granuloso e pallido- 

 fusco-cinerascente hypothallo dein nigro ; apotheciis mediocribus ses- 

 silibus disco piano pallido-fusculo hypothecio nigro-fusco imposito 

 margine tenui nigricante. Sp. octonaj, mediocres, incolores, simplices, 

 ovoidete, dein oblongo-ovoidece apice altera nunc attenuator, vel fusiformi- 

 eUipsoideoe, diam. 1^-3° longiores. Paraphyses conglutinatae. Perhaps 

 nearest to L. Piperis, (Spreng.) Nyl., which has a different thallus, 

 and rather smaller spores. 



Lecidea (Biatora) polycampia, sp. nov. : thallo subcartilagineo 

 inasquabili rimoso mox sorediifero ex olivaceo cinerascente ; apotheciis 

 majusculis adnatis disco subplano opaco lurido-rufescente hypothecio 

 crasso nigro imposito margine crasso obtuso pallidiori mox flexuoso. 

 Sp. in thecis clavatis 6 - 8nae, incolores, simplices, ex ovoideo ellip- 

 soideae, nitidae, diam. \\-2° longiores. On trunks in the island of 



* Lecidea Halei (Tuck.) Nyl. Enum. Suppl. (Pannaria, Tuck. Suppl. 1, 1. c. 

 p. 424), though differing from the other forms above considered, and in itself suffi- 

 ciently distinct-looking, is, in the larger view we have been enabled here to take, 

 by no means more separable than those. 



