238 PROCEEDINGS OF THE ACADEMY OF [1890. 



be filled with carnose bright flesh-red material which is also often 

 visible through the broadly perforated ostiola. The lower part of 

 the perithecia is white inside. Asci clavate-cylindrical, 75-80 /^. 

 long (p. sp. about 40 x 12 //.). Paraphyses abundant, longer than 

 the asci. Sporidia crowded-biseriate, oblong-fusoid, slightly curved 

 3-septate, the next to the upper cell swollen, hyaline, 20-22 x 82- 

 4 J //. The upper part of the perithecia seems to be covered (as in 

 Clypeosphaeria) with a more or less distinct cap of black carbona- 

 ceous matter which is irregularly ruptured by the emergent ostiolum. 



Pleospora diaportheoides, 



On old stems of parsley {Petroselinum), Newfield, N. J., May, 

 1890. Perithecia scattered, depressed-hemispherical, about 200 p.. 

 diam. erunipent-superficial, with a short, stout, cylindrical ostiolum. 

 Asci clavate-cylindrical, 75-85 x 12-15 ,a. with stout, jointed para- 

 physes. Sporidia subbiseriate, oblong-elliptical, yellow-brown, 3- 

 septate with one or more of the cells divided by a longitudinal sep- 

 tum, not constricted at the septa, about 15 //. long (14-18 x 7-8 ,a.). 



Pleospora hyalospora. 



On leaves oi Lathyrus sativus (1348) and Pisxmi sativum (1370). 

 Starkville, Miss., ]\Iay and June, 1890. S. M. Tracy. Perithecia 

 scattered, depressed-hemispherical, 75-90 //., of coarse cellular struct- 

 ure, at first sunk in the parenchyma of the leaf, finally more or less 

 erumpent-superficial, with a papilliform ostiolum. Asci oblong, 75 

 -85 X 35-40 !'.., 8-spored. Sporidia oblong or slightly ovate-oblong, 

 3-6-septate (mostly 5-septate), with one or more longitudinal septa 

 more or less distinct, nearly hyaline, ends obtusely pointed or rounded 

 slightly constricted at the septa, especially at the middle one, 25-40 

 (mostly 25-30) x 12-15 //. Differs from P. Pisi (Sow.) in its obo- 

 vate asci, nearly hyaline sporidia and more delicate smaller peri- 

 thecia. 



Pyrenophora zabriskieana. 



On bark of JJhnus Americana, New Baltimore, N. Y., Apr., 1872. 

 Rev. J. L. Zabriskie, No. 108. Perithecia loosely gregarious, 

 erumpent-superficial, ovate-globose, 175-200 //. diam. densely 

 clothed with straight, erect, sparingly-septate, yellowish-brown hairs 

 100-125 p.. long and about 5 />-. thick at the base tapering gradu- 

 ally to the subacute tip, of membranaceous texture and dark yellow- 

 ish-brown color (under the microscope). Asci clavate-oblong, 100- 

 112 X 22-25 !J: rounded above, with a short, abrupt, stipitate base. 



