Riddle: Lichens Collected in Jamaica 129 



uneven. Apothecia 0.8-1.5 mm. in diameter, scattered, some- 

 what elevated, convex to globular, in part irregular to subdifform, 

 always emarginate. In section the entire apothecium below the 

 hymenium is brownish-black, becoming a beautiful rose-red with 

 KOH ; epithecium fuliginous ; hymenium pale, becoming greenish- 

 blue with iodine. Spores 8, hyahne, narrow-ellipsoid, somewhat 

 larger at one end, bilocular, 10-13 X 4-5 iJ^- 



Type collected on bark, Jamaica, B. W. I. Clara E. Cummings 

 no. 127, in the herbarium of Wellesley College. 



20. Megalospora Cummingsiae sp. nov. 



Thallus sulphur-color, thick and irregular, coarsely verrucose- 

 granulose to finely mealy. Apothecia ample, 2-3 mm. in diameter, 

 dark rufous-brown, with a thick, entire, concolorous and per- 

 sistent margin. Epithecium and exciple deep brown ; hymenium 

 white, opaque, 250 /x, high, without reaction with iodine; hypo- 

 thecium thin, white, subtended by a brownish-black layer. Spores 

 solitary or 2, thick-walled, curved, 72-110 X 20-26 /x. Distinct 

 from M. sulphurata Mey. & Flot. in the partly mealy thallus, the 

 large spores, and the absence of reaction of the hymenium with 

 iodine. 



Type collected on bark, Jamaica, B. W. I. Clara E. Cummings 

 no. 129, in the herbarium of Wellesley College. I take pleasure 

 in naming this new species after its discoverer, in recognition of 

 her services to North American lichenology. 



21. Megalospora jamaicensis sp. nov. 



Thallus stramineous, thin, continuous, smooth and shining. 

 Apothecia 1-1.5 mm. in diameter, elevated, disk pale brown, with 

 a thick, stramineous margin, which is entire when young, becom- 

 ing crenate with age. Exciple pale yellow, epithecium and hypo- 

 thecium hyaline. Spores solitary (or 2), hyaline, bilocular, thick- 

 walled, straight or slightly curved, 72 X 20 ix. Distinct from M. 

 sulphurata Mey. & Flot. in the color of the apothecia and the 

 straighter spores. 



Type collected on bark, Jamaica, B. W. I. Clara E. Cummings 

 nos. 138 and 142, in the herbarium of Wellesley College. 



22. Megalospora versicolor (Fee) Zahlbr. in Engler & Prantl 



Nat. Pflanzenfam. Teil i, Abt. i*, p. 134. 1905. Lecidea 

 Fee. Heterothecium Flot. Cummings nos. 151 and 153. 



