138 PROCEEDINGS OF THE ACADEMY OF [1893. 



Asci oblong, short-stipitate, overtopped by the abundant, filiform 

 paraphyses, 35-60 x 10-12//, 8-spored. Sporidia biseriate, clavate- 

 pyriform, yellowish-hyaline, 1-2-septate, not constricted, subinequi- 

 lateral, 13-15 x 4-5//, at first filled with minute nuclei and without 

 septa. The specimens were not well matured and it may be that the 

 sporidia become 3-septate, but only 2 septa were seen. 



Massariovalsa caudata E. & E. 



On bark of dead Uhnus, London, Canada. June, 1892. (Dear- 

 mess, No. 1,901.) 



Perithecia subcircinate, 3-8 together, buried in the scarcely 

 altered substance of the inner bark, coriaceo-membranaceous, i-£ 

 mm. diam., their obtusely conic-papilliform ostiola erumpent in a 

 small, compressed fascicle through the pustuliform-elevated epider- 

 <mis. Asci broad oblong-clavate, pseudoparaphysate, substipitate, 

 8-spored, p. sp. 80-110 x 20//. Sporidia biseriate, oblong, obtusely 

 irounded at the ends, hyaline, becoming brown, 3-septate, 25-45 x 

 12-15//, with a cornute, mostly curved, hyaline, evanescent append- 

 age 12-20// long, at the lower end and sometimes at both ends. 



The sporidia have a thin, hyaline envelope and remain for a long 

 time hyaline. 



Clypeosphaeria minor E. & E. 



On bark of dead birch roots, London, Canada. April, 1892. 

 <.(J. Dearness.) 



Perithecia gregarious, about I mm. diam., slightly sunk in the 

 inner bark and raising the epidermis into distinct pustules pierced 

 • at the apex by the slightly compressed, subcorneal ostiolum. Asci 

 clavate, 50-55 x 5//, with filiform paraphyses 8-spored. Sporidia 

 sub-biseriate, fusoid-oblong, olivaceous-brown, 3-septate, slightly 

 curved, 10-12 x 2J-3//, attenuated toward each end but subobtuse. 



Clypeosphaeria ulmicola E. & E. 



On dead limbs of Ulmns, London, Canada. April, 1892. (Dear- 

 ness, No. 1,776.) 



Perithecia thickly but evenly scattered, buried in the bark which 

 is raised into minute pustules, about V mm. diam., of a slaty black 

 color and of uniform soft consistence throughout. Ostiola papilli- 

 form, erumpent through the minute, black stromatic shield but not 

 , prominent. Asci (p. sp.) 75-85 x 8-9//, cylindrical, paraphysate. 

 Sporidia uniseriate, oblong-elliptical, brown, 3-septate and often con- 

 stricted at the middle septum, 14-16 x 7-8//, ends rounded and 

 obtuse. 



