394 
receding’ margin, simple and slightly paler than the disk. Spores 
small, ellipsoid or ovoid, hyaline, entire, * X° jie. 
; 23X83 ; 
Occurring on various barks in San Luis Potosi, Mexico, 1887. 
Mr. C. G. Pringle, No. 155. 
THELOTREMA CARNEA N. sp. 
Thallus orbicular, becoming irregularly diffused over large 
areas, thin-membranaceous, minutely granulose, soft, frequently 
traversed by narrow waving anastomosing black lines, from 
pale carnate to rosy pink. Apothecia small to very minute, 
sunken in the thalline layer, open, the interior exciple quite dis- 
tinct from the outer border, which is erect with a rounded subcre- 
nulate margin. Disk black, slightly roughened, the exterior 
exciple thickened. Spores oblong, triseptate 1 poate mic: 
This striking species occurs on trunks of Ce/tes occidentalts in 
. the low country near St. Martinsville, Louisiana. A. B. Langlois. 
- Bratora (PATELLARIA) FLOCULESCENS N. sp. 
Thallus more or less mixed, made up principally of small pare 
late or crustaceous scales, roughish and covered by an extremely 
fine flocculent pubescence, imparting to the surface a soft appear 
ance, ashy brown to darker. Apothecia quite flat, but becoming 
convex. Disk chestnut brown, margin simple, entire, tn 
in older stages of growth, paler within. Spores simple, Ovo! 
hyaline, entire »>xX10 _. 
; xe mic. : 
On bark near Monterey, Mexico. Mr. C. G. Pringle, 1887, 
no. 253. 
BIATORA (PATELLARIA) DISPERSA N. sp. 
Thallus smooth, uneven, finely granulate, limited by 4 me 
line and dispersed evenly over the bark area, ash cet 
becoming paler at the border. Apothecia adnate, sessile, paler, 
flat; disk smooth and surrounded by a waving, irregular, ree: 
true margin which is enclosed by ‘a thicker, light thalline ‘ods i 
reddish brown to black, entire. Spores hyaline, broadly © 
9X12 e 
ae mic. ' 387 s) 
On barks, San Luis Potosi, Mexico. Mr. C. G. Pringle, 19°/" we 
BIATORA SUTURALIS n. sp. 
Thallus slightly thickened, crustaceous and becoming fine 
_ §fanulose, broken up into areola-like divisions, but gine 7 
mose, interspersed throughout by distinct, prominent, Lend 
_ Suture-like, black, diffuse lines, from pale ashy to cream ©” 
