269 NATURAL HISTORY BULLETIN. 



is easily distinguished on account of the number of spores in 

 the ascus which is constantly four as is indicated by its specific 

 name. 



HUMARIA MURALIS Quel. 



Plate XI, fig. n. 



|N7 ( > Peziza (Hitmaria) muralis Quellet, Grev. , VIII, p. 116. 

 L889 Humaria muralis Saccardo, Sylloge Fung., VIII, p. 127. 



Cups minute, sessile, gregarious or scattered, hemispherical, 

 then expanded, orange yellow, 2 to 5 mm. in diameter; hymen- 

 ium plane or nearly so; asci clavate; sporidia 8, fusiform, 2 to 

 3-guttulate, smooth, 25 to 30 by 7 to 9 microns, in one or two 

 rows in the ascus or irregularly arranged; paraphyses much 

 enlarged at their apices and filled with orange granules, 6 to 

 10 microns in diameter. 



Habitat — On sandy soil among moss, Indiana and Iowa. 



Plants collected only in small numbers but very conspic- 

 uous on account of their large elongated spores which are 

 generally very irregularly arranged in the ascus. The spores 

 generally have one large guttula near the center and one or 

 more smaller ones on each side. Similar to H. tctraspora ex- 

 cept as to the number of spores in the ascus and a slight var- 

 iation in the size of the spores. 



Genus VIII— G E O P Y X I S Per soon. 



Receptacle funnel-shaped or spreading. For the most part, 

 large fungi with a distinct stem which is generally short and 

 thick. 



One species collected which is common on decaying wood 

 in woods; Iowa City. 



Geopyxis nebulosa {Ckti.) Sacc. 

 Plate XXI, fig. n. 



1879 Peziza nebulosa Ellis and Everhart, A. N. Fung., No. 281. 

 1889 Geopyxis nebulosa Saccardo, Sylloge Fung., VIII, p. 70. 

 JS')7 Geopyxis nebulosa Eugler-Prantl, Pflan. Faniil. , I, i, p. L85. 



