26 ILLINOIS BIOLOGICAL MONOGRAPHS [192 



32. Gymnopeltis teinidadensis Stevens n. sp. 

 [Figures 63 to 65.] 

 No free mycelium. Ascomata superficial, scattered, punctiform, red, 380 

 to 460/i in diameter, thin, flat. Asci solitary, scattered, naked, subglobular, 

 8-spored, 22 to 25 x 18/i, slipitate. Spores hyaline, unequally 2-celled, 

 11 X 3.5m, large at one end tapering to the other end, obtuse. 

 On Mauritia. 



Trinidad: Cumuto, August 16, 1922, 979. 

 This fungus in its flat, non-radiate ascoma shows closest kin-ship to 

 the Thrausmatopeltineae from which it is separated by the scattered, 

 naked asci, a combination of characters that led Stevens and Guba to 

 erect the group Gymnopeltineae to which the present fungus clearly be- 

 longs, though it differs in many ways from the genus, Hexagonella, the 

 only other known member. 



PERISPORIACEAE 



Key to genera involved. 

 Perithecium and mycelium superficial, mycelium without hyphopodia. 

 Setae present. 



Perithecial setae simple 



Spores hyaline Dimeriella p. 26 



Spores brown 



2-celled 



Aparaphysate Phaeodimeriella p. 27 



Paraphysate Meliolinopsis p. 27 



4 to 6-celled Hyalomeliolina p. 27 



Perithecial setae forked Oplothecium p. 28 



Setae absent or atypical 



Perithecium setose Haraea p. 29 



Perithecium smooth, spores brown, 2-celled 



Perithecium red Parodiopsis p. 29 



Perithecium black Dimerium p. 31 



Perithecium yellow Mycophaga p. 31 



Perisporiaceae imperfecti Pycnodothis p. 32 



Dimeriella Speg. 

 Fung, aliquot Paulistani p. 12 in Revista del Museo de La Plata 15^ 

 1908. 



32>. Dimeriella erigeronicola Stevens. 

 111. Acad. Science 10:166 to 167, 1917. 

 On Erigeren bonariensis. 



British Guiana: Tumatumari, July 11, 1922, 204. 

 This fungus agrees with Dimeriella erigeronicola found by Stevens in 

 Porto Rico. 



