426 



a light colored, oblong (3-4 x 2-3 mm.) sti-oma and penetrating to the 

 wool, which is marked with a black, circumscribing line; necks sub- 

 convergent, their large, conic-globose ostiola connate at the base, but 

 without any distinct disk, erumpent through cracks in the slightly- 

 raised epidermis. Asci oblong-l'usoid, about 50x8-10 fi, snbsessile, 

 8-spored. Sporidia biseriate, oblong-elliptical, uniseptate and slightly 

 constricted, 12-14 x3^-4| //, ends subobtusc. The ostiola resemble 

 those of Eutypella cervicidata, only they are smaller and not sulcate. 



On dead maple limbs, London, Canada (Dearness). 



Closely allied to D. pustulata, (Desm.), but the specimen of that 

 species in Desm. PL Crypt, has a distinct, nearly round, almost plane 

 disk, with the ostiola only slightly prominent and narrower, and rather 

 longer, acute sporidia. 



D. congener, E. & E. (in Herb.) 



Exsicc. EU. & Evrht. N. A. F. 2d Ser. 2532. 



Stromata evenly scattered, depressed-conical, formed of the slight- 

 ly altered substance of the bark which is lighter than the adjacent 

 parts, limited by a black, circumscribing line which penetrates the 

 wood, apex brownish-black, erumpent through the ruptured epidermis 

 which, however, is only slightly raised. Perithecia subcircinate, ad- 

 nate to the surface of the wood but scarcely penetrating it, about 6-8 

 in number, ^ mm. diam., rather abruptly contracted into slender, 

 slightly converging necks, piercing the disk with their rounded, obtuse, 

 soon umbilicate, slightly projecting ostiola. Asci clavato-cylindrical, 

 70-75 X 10-12 ,«. Sporidia uniseriate, direct or oblique, sometimes 

 partly biseriate above, elliptical, hyaline, uniseptate and strongly con- 

 stricted, each cell with a large nucleus, 12-14 x 6 fi. 



On dead limbs of Fraxinus, London, Canada (Dearness). 



In D. fihrosa, (Pers.) which is credited to this country by 

 Schweinitz & Berkeley, the asci and sporidia are scarcely distinguish- 

 able from those of our D. congener, but in that species the inner bark 

 is blackened and subcarbonized with long, coarse, light colored fibers 

 bedded in its surface just under the epidermis, and there is, in the 

 European specc. we have seen, no black circumscribing line penetrat- 

 ing the wood. The perithecia also are larger. Berkeley (Grev. IV,,p. 

 99.) states that in specc. from the mountains of New York, the sporidia 

 are at length "fenestrate," a character not applicable to D. fibrosa. 

 S-phcena extensci Fr. Schw. Syn. N. Am. 1315, is apparently not dis- 

 tinct from D. fibrosa. 



D. tecta, (Cke.) 



yalsa tecta, Cke. Grev. XI, p. 109, Syn. Pyr. 2000. 

 Diaportke tecta, Sacc. Syll. 6ogi. 

 Exsicc. Rav. F. Am. 747, 



