1893.] NATURAL SCIENCES OF PHILADELPHIA. 145 



(exceptionally 12-15x5-6//.), nearly hyaline and 2-nucleate at 

 first, becoming opaque and nearly black. Has the habit of Num- 

 mularia rumpens Ck., but distinguished by its dark red, subcarnose 

 stroma, inconspicuous ostiola and navicular sporidia. 



* * DISCOMYCETES. 

 Lachnea cervicolor E. & E. 



On rotten wood, Canada, (Macoun.) 



Ascomata, suborbicular, sessile, 4-10 cm. diam., flattened (shallow 

 cup-shaped), with the margin entire and incurved when dry ; out- 

 side clothed with a dense coat of short, dark ferruginous hairs, the 

 margin with longer, paler, septate hairs 400-600// long and decum- 

 bent or appressed; disk when dry liver color. Asci cylindrical, 

 150-200 x 15//, p. sp. 120-150//, long. Paraphyses abruptly thick- 

 ened at the apex which is about 5//, thick and hyaline. Sporidia 

 uniseriate oblong-elliptical, with one large, oblong nucleus or with 

 two smaller ones, hyaline, 18-22 x 11-12//, epispore smooth or some- 

 times very faintly granular-roughened. 



Allied to L. lanuginosa (Bull.), L. hainsei and L. aurantiojms 

 Ell., but apparently distinct. 



Orbilia caulophylli E. & E. 



On dead stems of Caulophyllum thalictroides, London, Canada. 

 May, 1892. (Dearness, No. 1,825.) 



Ascomata scattered or gregarious, sessile, gelatinous, pale rose 

 color when fresh, orange when dry, about 5 mm. diam., disk plane 

 or slightly concave when fresh, more strongly concave when dry, 

 margin thin, spreading and imperfectly laciniate-toothed when fresh, 

 outside clothed with short, pale glandular hairs. Asci clavate-cylin- 

 drical, 40-50 x 5-6/z, 8-spored ; paraphyses filiform, not distinctly 

 thickened at the tips. Sporidia biseriate, clavate-oblong, hyaline, 

 continuous, 5-6 x 1?// (at the thick end.) 



Helotium lacteum E. & E. 



On decorticated wood, Cazenovia, N. Y. Oct., 1887. O. F. 

 Cook, No. 201, and Marcellus, N. Y. Nov., 1889. (Underwood, 

 No. 66.) 



Gregarious and subconfluent. Ascomata stipitate, hemispherical, 

 5-1 mm. across, outside and the slightly concave disk with a thin 

 margin, glandular-pruinose, white with a tinge of yellow, the yellow 

 becoming more distinct when dry. Stipe cylindrical, stout, less in 

 length than the diameter of the disk, pale and pruinose. Asci 



