1895.] NATURAL, SCIENCES OF PHILADELPHIA. 427 



Stroma interruptedly effused continuous for 2-4 cm., or subro- 

 bicular, i-1 cm. across, about 1 mm. thick, margin abrupt, some- 

 times the upper edge slightly projecting, conidial layer rusty-red, 

 same color as in H. perforatum (Schw.) Perithecia monostichous, 

 ovate, %-i mm., the apices only slightly prominent, with small, 

 papilliform ostiolum, finally perforated. Asci cylindrical, rather 

 long-stipitate, abundantly paraphysate, 8-spored, p. sp. 90-110x7 

 -8 ix. Sporidia uniseriate, oblong-navicular, 14-18 x 6-7 ft, yellow- 

 ish at first, with a single large central nucleus, finally opake. 



Distinguished from H. rubiginosum (Pers.), by its larger sporidia. 



Phyllachora Plantaginis E. & E. 



On leaves of Plantago Rugelii, Racine, Wis., Oct., 1894. Dr. J. 

 J. Davis, No. 943. 



Kpiphyllous, gregarious, on dead areas of the leaf, convex-hemis- 

 pherical, black, \—i mm. diam., or 2-3 confluent and then larger, 

 base innate in the surface of the leaf, apex papilliform. Cells filled 

 with oblong, hyaline, 2-nucleate stylospores 6-8 x 2-2£ //. Asci not 

 yet formed. 



Evidently the early stage of Phy/lachora. 



Dothidella longissima (Pers.) E. & E. 



Sphaeria longissima Pers., Syn. p. 31. Phoma longissima West. 

 Not. Ill, p. 13. 



Perithecia densely gregarious, seated on a thin, black subiculum 

 forming long, narrow, black, ribbon-like strips 1-1 h mm. wide, 

 extending from node to node on the stems, minute, slightly prom- 

 inent, not confluent, covered at first by the blackened epidermis. 

 Ostiola inconspicuous, or minutely papilliform. Asci oblong, 40 x 

 7-9 p., nearly sessile, paraphysate. Sporidia biseriate, oblong, uni- 

 septate, but scarcely constricted, obtuse, hyaline, 12-15 x 3* p.. 



On dead stems of Chenopodi um album, Kansas. Bartholomew & 

 Shear. 



Homostegia coscinodisca E. & E. 



On bark of birch trees. Newfoundland. Waghorne. 



Stromata erumpent-superficial, discoid- pulvinate, J-f mm. diam., 

 pierced above with 6-8 small round openings but without any promi- 

 nent ostiola. Ascigerous cells about 75 p. diam. , with thin subhy- 

 aline walls so that they are not easily distinguished. Asci oblong, 



