GYALECTACEAE. 541 



Family 3. COENOGONIACEAE. 



1. COENOGONIUM Ehrenb. 



1. Coenogonium interplexum Nyl. Aim. Sci. Nat. IV: 16: 92. 1862. 



On trees, Abaco, vicinity of Cherokee Sound, and Andros, at Louisa Coppice, 

 near Nicholl's Town : Costa Rica ; Colombia ; Venezuela. 



Family 4. PILOCARPACEAE. 



1. PILOCARPON Wainio. 



1. Pilocarpon tricholoma (Mont.) Wainio, Lich. Bres. 2: 89. 1890. 



Biatora tricholoma Mont, Ann. Sei. Nat. Ill: 16: 53. 1851. 

 Lecidea leucoblephara Nyl. Ann. Sci. Nat. IV: 19: 337. 1863. 



On leaves of Eugenia, Crooked Island, at Stopper Hill : widely distributed in 

 tropical America. 



Family 5. LECANACTIDACEAE. 



1. LECANACTIS Eschw. 

 1. Lecanactis denticulata Wainio, Ann. Acad. Sei. Fenn. A: 6 7 : 141. 1915. 

 Opegrapha acicularis Riddle, Mem. Brooklyn Bot. Gard. 1: 110. 1918. 



On bark of Coccolobis laurifolia, Great Harbor Cay, Berry Islands, and on 

 Eugenia buxifolia, Watling's Island: Florida; Cuba; St. Thomas; St. Croix; Porto 

 Rico. 



It has only recently been possible for me to see a copy of Wainio's paper. His 

 description of L. denticulata differs from that of O. acicularis only in stating that 

 the base of the amphithecium is black, while I found it to be colorless in the mate- 

 rial that I examined ; but the denticulate margin of the apothecia is so peculiar and 

 so characteristic that I am convinced that the plants are the same. Furthermore, 

 the acicular spores are identical, and Wainio has proposed a new section Bacidiactis 

 to receive this species. 



Family 6. GYALECTACEAE. 



Spores one-celled. 1. Ionaspis. 



Spores two-celled. 2. Microphiale. 



1. IONASPIS Th. Fr. 

 1. Ionaspis tropica Riddle, sp. now 



Thallus crustaceus effusus tenuissimus cum saxo conferruminatus, fusces- 

 cens, minutissime farinosus, circa apothecia rimuloso-areolatus. Gonidia pauca 

 chroolepoidea. Apothecia caespitosa minuta, in areolis thallinis immersa, disco 

 primum punctiforme dein aperto ad 0.3 mm. lato, concavo aut piano, eastaneo 

 aut fuscescente, margine pallidiore integro tenue parum prominente persistente; 

 epithecio fulvo, excipulo et hypothecio pallido. Asci clavati 8-spori. Sporae 

 incolores simplices ellipsoideae membrano tenue, 10-12 X 6-7 fi. 



On limestone, New Providence (Brace, November 20, 1918, 0G97, type). 

 This species has the general appearance of Ionat<iiix nuacculcns (Ach.) Arnold, 

 but differs in the brown thallus and disk of the apothecium. 



2. MICROPHIALE Stizenb. 



1. Microphiale liitea (Dicks.) Steiner, Sitzungsber. kais. Akad. Wiss. Wien 

 106: 227. 1897. 



Lichen Intern Dicks. PI. Crypt. Brit. 1: 11. 1785. 

 Gyalecta lutea Tuck. Gen. Lich. 136. 1872. 

 On bark, New Providence : widely distributed. 



