1 6 Cincinnati Society of Natural History. 



in diameter, the segments expanding ^-i inch. A very pretty little 

 Geaster, difficult to find amongst the grass. It is sometimes found 

 with the circular marginal chink around the mouth as in G. margina- 

 tum, Vitt. 



II. Sessiles. Outer peridium multifid or sometimes deeply parted, 

 with only the segments reflexed ; the base convex below, not vaulted: 

 the fleshy layer thin ; inner peridium sessile. 



c. Mouth sulcate-plicate. 



7. G. umbilicatus, Fr. Outer peridium multipartite, the segments 

 7-10; inner peridium globose or depressed-globose, sessile, brown; 

 the mouth conic, sulcate-plicate, seated in a circular depressed mar- 

 ginate disk. Columella slender, cylindric, with a broad base; threads 

 of the capillitium rather thicker than the spores, pale brown, spores 

 globose, minutely warted brown, 3.5-4 mic. in diameter. 



Growing on sandy soil. New Jersey, Ellis. Inner peridium about 

 y 2 of an inch in diameter, the segments unequal, lanceolate. A 

 beautiful little species, readily distinguished by the depressed margin - 

 ate mouth, elegantly plicate and furrowed. It is G. mammosus No. 

 no of Ellis's N. A. Fungi. 



d. Mouth ciliate-fimbriate. 



8. G. mammosus, Chev. Outer peridium multipartite, the seg- 

 ments 7-10, hygrometric; inner peridium depressed-globose, sessile, 

 pale or yellowish to brown; the mouth slightly elevated, ciliate-fimbri- 

 ate, seated in a paler circle. Columella short, cylindric, with a broad 

 convex base ; threads of the capillitium rather thinner than the spores, 

 pale brown ; spores globose, minutely warted, brown, 5-6 mic. in 

 diameter. 



Growing in sandy soil. California, Harkness. Inner peridium about 

 y 2 of an inch in diameter, the segments with a brown cartilaginous - 

 gelatinous layer which is strongly hygrometric. There is much dis- 

 crepancy among authorities as to the size of the spores ; we have 

 given our own measurement of the spores in specimens which are 

 supposed to be authentic. 



9. G. fimbriatus, Fr. Outer peridium multifid, the segments 

 5-10; inner peridium globose, sessile, pallid to pale brown; mouth 

 little elevated, hairy-fimbriate. Columella obovoid or subclavate; 

 threads of the capillitium nearly twice as thick as the spores, pale 

 brown ; spores globose, even or very minutely warted, pale brown, 

 3-3.5 mic. in diameter. 



