80 



Mycologia 



lamellae, margin entire, inroUed when young; lamellae free to 

 adnate, whitish, dull, several times inserted, broad, distant, the 

 edges white and slightly crenulate; spores subovoid, slightly flat- 

 tened on one side, smooth, uninucleate, very pale melleous under 

 the microscope, 6X41^; stipe crooked, arising from a mat of 

 white mycelium, slightly enlarged above, smooth, glabrous, whit- 

 ish, hygrophanous, i cm. long, about i mm. thick. 



Type collected on a rotten log in a moist virgin forest in the 

 Tepeite Valley, near Cuernavaca, Mexico, 7,000 ft. elevation, 

 December 28, 1909, W. A. & Edna L. Murrill 485. 



15. Naucoria Underwoodii sp. nov. 



Pileus thin, rather fleshy, convex to expanded, scattered, 2 cm. 

 broad; surface glabrous, hygrophanous, brownish, ochraceous 

 when dry, the disk darker; lamellae adnexed, subcrowded, 

 rather broad, subventricose, dull-fulvous; spores broadly ellip- 

 soid, smooth, 8-9 X ; stipe crooked, slightly larger below, 

 concolorous, hollow, subfibrillose, the apex floccose-fibrillose, 3 

 cm, long, 3 mm. thick. 



Type collected on rotten wood on El Yunque, Cuba, 1,800 ft. 

 elevation, March, 1903, Underzvood & Earle 12^'/. 



16. Naucoria xuchilensis sp. nov. 



Pileus convex to plane, slightly depressed, solitary, 3.5 cm. 

 broad; surface ochraceous, slightly fulvous at the center, subgla- 

 brous, even ; lamellae adnate, broad, distant, inserted, fulvous ; 

 spores ovoid, smooth, uninucleate, ochroleucous, 7-9 X ASl^ 5 

 stipe cylindric, equal, glabrous, cremeous, 2 cm. long, 3 mm. 

 thick. 



Type collected in rich, low ground under coffee trees at Xu- 

 chiles, near Cordoba, Mexico, 1,500 ft. elevation, January 17, 

 1910, W. A. & Edna L. Murrill 11 24. 



Doubtful Species 



Agaricus (Naucoria) papillaris Fries, Nova Acta Soc. Sci. 

 Upsal. III. i: 225. 1851. Collected by Krebs in the island of 

 St. Thomas. Types not found. 



Naucoria sideroides (Bull.) Quel. Champ. Jura Vosg. 99. 

 1872. Reported by Berkeley from Wright's Cuban collections, 

 but evidently a wrong determination. 



