1890.] NATURAL SCIENCES OF PHILADELPHIA. 2.S9 



Paraphyses slender and numerous but inconspicuous. Sporidia 

 crowded-biseriate, ovate-elliptical, densely niuriform, rounded at the 

 ends, yellowish-brown 22-30 x 12-14 //. constricted across the 

 middle. The sporidia are so closely and densely muriform as to 

 appear granular, the granular contents being arranged in transverse 

 lines across the sporidia so that they appear 12 or more septate. 

 Differs from P. pnlyphragmia, Sacc. to which it comes nearest in its 

 smaller perithecia and shorter sporidia. 



Fenestella amorpha. 



On dead hickory limbs, Lyndon ville, N. Y., Apr., 1888. Dr. C. 

 E. Fairman. Stroma tuberculiform, seated on the wood, variable 

 in size from 1mm. inclosing a single perithecium to 3 or 4 mm. with 

 4-6 perithecia, or sometimes confluent in a seriate manner .for 1 cm. 

 or more, black outside, whitish within, mostly depressed-hemispher- 

 ical with the stout, cylindrical ostiola rising from the apex or burst- 

 ing out through cracks in the bark but scarcely projecting. Asci 

 cylindrical 150 x 15 //. (p. sp. 100-110 x 15) with abundant 

 paraphyses. Sporidia uniseriate, elliptical, 5-6-septate and muri- 

 form, becoming almost opaque, so that the septa are hardly visible. 

 20-22 x 12-14 ,'j.. When the bark falls away the stroma becomes 

 superficial. 



Ophiobolus trichisporcis. 



On dead culms of grass, London, Canada, June, 1890. Dear- 

 ness, 1734. Erumpent-superficial. Perithecia ovate-conic, t mm. 

 or less in diam. attenuated above into the acute short-beaked 

 ostiolum. Asci, 170-200 x 3 //. Sporidia filiform multinucleate, 

 nearly as long as the asci. Differs from 0. stictisporus E. & E. 

 principally in its acutely beaked j^erithecia. 



Ophiobolus medusae, E. & E. J. M. I., p. 150. var. minor E. & E. 



In leaves of Andropogon murieatus, St. Martinsville, La., Feb., 

 1889. Langlois, No. 1771. Differs from the specimens on Spartina 

 in its erumpent larger ostiolum and smaller asci and sporidia which 

 are 110-120 x 7-8, a. and 90-110 x 2^ //. respectively. The peri- 

 thecia, mode of growth, etc., are the same as in the original speci- 

 men. 



Melauomma commonsii. 



Parasitic on Hypoxylon sassafras, Wilmington, Del., Jan., 1890, 

 Commons, 1258. Perithecia gregarious, ovate-globose, rough, black, 

 minutely tomeutose-pubescent when young, 110-125 /j-. diam. Os- 



