420 PROCEEDINGS OF THE AMERICAN ACADEMY 



Massachusetts. On pine and cypress trunks ; low country of South 

 Carolina, Mr. Ravenel. Thallus of rounded, smooth, commonly scat- 

 tered, greenish-glaucescent granules. Apothecia minute, convex and 

 subimmarginate from the first ; sessile or at length a little elevated ; the 

 black and shining disk finally turgid and papillate, and imposed upon 

 a black hypothecium. Spores small, from broad-spindle-shaped with 

 acuminate tips becoming more elongated, and at length clubshaped 

 or acicular, commonly diblastish, but at length tetrablastish ; the length 

 from six to twelve or even sixteen times exceeding the diameter. 

 Belonging to the group of which L. rubella is a type (Bacidia, De 

 Not.) ; but the black apothecia and sometimes slightly curved spores 

 rather approach those of Zi. holomelcena, Floerk. {Scoltciosporum, 

 Massal., only differing from Bacidia in the contortion of the spores), 

 not uncommonly occurring on granitic stones, and, in another form 

 (Z. asserculorum, Ach.) on old rails. 



Lecidea granosa, sp. nov. : thalli effusi granulis minutis conges- 

 tis vel confluentibus e viridulo cinerascentibus ; apotheciis minutis 

 appressis plano-convexulis, disco nigro (livido-pallescente) marginem 

 tenuissimum nigrum demum excludente. SporiB octonoe, incolores, e 

 dactyloideo subbacillares, di - tetrablastae, diam. 3 - 6-plo longiores. 

 On brick walls, near New Orleans, Dr. Hale. On bricks, and also on 

 mortar, in the low country of South Carolina, Mr. Ravenel. Thallus 

 of very minute granules, which are heaped, more or less densely, into 

 an irregular, broken crust, or occur more scattered and inconspicuous, 

 or grow together into a thin, clunky one, from greenish becoming at 

 length glaucescent or cinerascent. Apothecia very small, closely ap- 

 pressed (or even immixt) and flat ; the black (or livid-pallescent) disk 

 bordered by a thin black margin, which disappears as the disk finally 

 becomes a little convex. Hypothecium black. Spores varying no 

 little, colorless, from ellipsoid soon elongated and narrowed, and 

 from dactyloid or often clubshaped becoming cylindraceous or staff- 

 shaped ; perhaps more commonly diblastish, but also and often regu- 

 larly tetrablastish (regular 5-blastish spores occur rarely, but no 

 regular ones have been observed with a greater number of sporo- 

 blasts), the length from three to six or even seven times longer 

 than wide. Paraphyses not distinct. A smaller lichen, in all re- 

 spects, than L. aromatica (Sm.) Ach. (Herb. Borr. ; Desmaz. in 

 Hei'b. Ravenel; Herb. Krempelh.) with slenderer spores. 



Lecidea Simodensis, sp. nov. : thallo primitus contiguo subtar- 



