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Rh WEST VIRGINIA GEOLOGICAL SURVEY

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reddish-yellow, soon confluent forming large, brown, dry, dead spots of irregular shape and indefinite outline, occupy ing a large part of the leaf. Acervuli not numerous, scat tered, epiphyllous, prominent, resembling perithecia; conidia oblong-elliptical, 12 to 16 x 6 to 7 ц. Differs from G. Rubi E. & E. in its larger, fewer, black acervuli and broader conidia, which also are about twice as large as in G. Venetum Speg. MYXOSPORIUM Link. M. luTEM E. & E., Proc. Phila. Acad., 1893, 458. Type habitat: On bark Hicoria ovata, April to July. 1893 (Nuttall, discov. 1015, 79). E. & E. N. A. F. 2953. Fungi Columbiani 150. Stroma globose-conical, light yellow, .75 to 1 mm. diam eter, slightly sunk in the inner bark, unilocular and opening by a single pore. The surface of the inner bark around this pore is of a pale slate color, the colored portion definitely limited by a black line so as to form an irregular circle about 2 mm. across, but this line does not penetrate the bark. Sporules navicular-oblong, hyaline, obtuse, 10 to 11 x 4 to 5 1i with i to 2 large nuclei. Basidia slender-cylindrical 15 to 20 x 1.5 ц. Mass of exuded sporules .flesh color. M. Rhois (B. & C.) Sacc. On fire killed Rhus hirta, June 20, 1895 (Nuttall, 1575, 537)M. platANicoLUM E. & E., Proc Phila. Acad., 1894, 372. Type habitat: On limbs Platanus occidentalis, April 24, 1894 (Nuttall, discov. 1485, 467). Acervuli subcutaneous, vesiculoid, pale, 1 mm. diameter, raising the ruptured epidermis into pustules but not erumpent. Sporules oval or oblong-ovate, hyaline, nucleate at first, 10 to 12 x 5 to 6 ц, on stout basidia.M. SERiatUM E. & E., Proc. Phila. Acad., 1894, 372. Type habitat : On bark of Acer sp., June, 1894 (Nuttall, discov. 1552, 523). Nuclei pallid, orbicular, about 1 mm. diameter, seated on the surface of the inner bark; surrounded by a thin layer of smoky colored radiating hyphae, from the inner extremities of which the botuliform or oblong, 6 to 8 x 2 to 2.5 ц hyaline conidia are produced. The nuclei are sed ately arranged, and the pale flesh-colored, flatfish cirrhi ar¿ erumpent through narrow, longitudinal cracks in the bark.