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. " Perithecia globose, collapsing, rugged, seated on a brown 

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

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



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

 nus, South Carolina (Ravenel). 



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

 dieulate sporidia, and for this reason it is here referred to Rosellinia, 

 but its true generic location is still uncertain. 



R. diderma (Schw.) 



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

 Amphisphcerella 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 

 Sphmria with the papilliform ostiolum at first prominent, but finally 

 deciduous. Within this outer wall is enclosed another dark brown 

 Sphceria, 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 fi. 



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



R. aperta, (Schw.) 



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

 Amphisphcrrella 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, papilli- 

 form ostiolum, which is finally deciduous, leaving the perithecium 

 broadly perforated above, concentrically striate outside, but scarcely 

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



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



R. euticuiaris, (Schw.) 



Sphceria euticuiaris, Schw. Syn. 1505. 

 Byssosphceria euticuiaris, Cke. Syn. 2650. 

 I 



Perithecia somewhat scattered, hemispherical, shining-black, 

 papillate, \-\ 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 R. subiculata. 



We find no measurements of the sporidia of this species. 



