175 



partially free. Seen at a distance, the color is very black, but lighter 

 (cinereous) when viewed with a lens. Berkeley (1. c.) says of Sphmria 

 ranella. — '' Peritliecia globose, collapsing, rugged, seated on a brown 

 stratum ; sporidia of two joints, the upper elliptical or pointed, da,rk, 

 the lower elongated and attenuated, with several nuclei, 1 8-25 /i long." 



On bare wood and branches, Bethlehem, Pa. (Schw.), on Plata- 

 uus, South Carolina (Ravenel). 



Cooke places this among species with brown, continuous, appen- 

 diculate sporidia, and for this reason it is here reicrred to RoseUinia, 

 but its true generic location is still uncertain. 



R. diderma (Schw.) 



Sphceria diderma, Schw. Syn. N. Am. 1593. 

 Amphisphesyella diderma^ Cke. Grev. XVI, p. 91. 



Scattered, simple, rather large, bicorticate. The outer wall has 

 the shape of a hemispherical or conical, denuded, rugose, dark brown 

 Sphoeria with the papiiliform ostiolum at first prominent, but finally 

 deciduous. Within this outer wall is enclosed another dark brown 

 Sphccria, frequently collapsed, immersed in the wood, and commu- 

 nicating with the outer ostiolum by an elongated neck. Sporidia (sec. 

 Cke. 1. c. ), almond-shaped, continuous, 14 x 8 /i. 



On dry rotten wood, Bethlehem, Pa. (Schw.) 



R. aperta, (Schw.) 



Sphieria aperta, Schw, Syn. N. Am. 1588. 

 Amphispharella aperta, Cke, Grev, XVI, p. 91. 



Perithecia black, connected by a black crust, crowded, but some- 

 times also scattered, semiimmersed, rather large, subcylindrically elon- 

 gated, truncate at the apex, collapsing, crowned with a large, papiili- 

 form ostiolum, which is finally deijiduous, leaving the perithecium 

 broadly perforated above, concentiically striate outside, but scarcely 

 rugose. Sporidia (sec. Cke. 1. c.) continuous, brown, oval, 7x5//. 



Rather rare, on rotten wood, Bethlehem, Pa. (Schw.) ' 



R. cuticularis, (Schw.) 



Sphceria cuticularis, Schw. Syn. 1505. 

 Byssosphcsria cuticularis, Cke. Syn. 2650. 



Perithecia somewhat scattered, hemispherical, shining-black, 

 papillate, \-l mm. diam., seated on a shining-white, longitudinally 

 effused, narrow, membranaceous subiculum, which is not pulverulent 

 or manifestly floccose. 



On bark, Bethlehem, Pa. (Schw.) Allied to It. subiculata. 



We find no measurements of the sporidia of this species. 



