1895. J NATURAL SCIENCES OF PHILADELPHIA. 417 



obtuse, 3-septate aud slightly constricted at the septa, sometimes 

 very slightly, curved, pale- olivaceous 9-11 x 3—3 -1 ;>. 



Melanomma nigricans E. & E. 



On rotten wood. Ohio. Morgan. 



Perithecia densely crowded, forming a nearly continuous layer on 

 the surface of the blackened wood, small (150-200//), subglo- 

 bose, nearly glabrous; ostiolum papilliform. Asci clavate-cylindrical, 

 short-stipitate, paraphysate p. sp. about 55x12//. Sporidia 

 bi.seriate, oblong-fusoid, slightly curved, obtuse, mostly a little 

 narrower at one end, hyaline at first, soon pale-brown, 3-septate, 14- 

 17x41-51/*. 



Some of the perithecia are smaller and contain oblong-elliptical, 

 brown, uniseptate and constricted spores 8-11x5-6//. Dipbdia. 



M. fuscidulum Sacc. has the sporidia about the same but the 

 perithecia are rather larger, with a cylindric-conoid ostiolum, and 

 are scattered or only gregarious and do not blacken the wood. 



Melanomma subcongrunm E. & E. 



On outer bark of Cottonwood trees. Populus monilifera, Rock- 

 port, Kansas, Sept, 1894. E. Bartholomew No. 1,584. 



Perithecia gregarious or erumpent-superncial, the base remaining 

 more or less sunk in the bark, ovate, slaty-black and muricuiately 

 roughened below, 1-f exceptionally 1 mm. diam. The conical 

 perforated ostiolum black and shining. 



Asci clavate-cylindrical, 150-190x12-14//, p. sp. 114-120// 

 long, surrounded by abundant, filiform paraphyses, 8-spored. Spo- 

 ridia overlapping-uniseriate, oblong, a little narrower at the lower 

 end, obtuse, slightly curved, 3-5-septate, slightly constricted at the 

 septa, pale brown. 



Allied to M. medium Sacc. and Speg. and to M. juniperinum Karst. 

 but differs from both in its much larger perithecia and longer asci, 

 and from the former in its 3-5-septate sporidia. 



Ceratostoma melaspermum E. & E. 



On rotten wood. Ohio, Morgan No. 1,041. 



Perithecia gregarious, buried, depressed-globose, membranaceous, 

 1-f mm. diam., with a straight, black, erumpent beak about 1 mm. 

 long, obtuse and often expanded at the top into a small, horizontal, 

 circular disk, and surrounded at the base with spreading, light- 

 yellow hairs forming a loose, tomentose-pilose tuft. Asci cylindrical, 



