251 
OPEGRAPHA SCAPHELLA, Nyl., var. GEMELLA (Esch.), Thal- 
lus contiguous, very thin, membranous, smooth and shining as 
occurring in narrow patches, circumscribed by an irregular bor- 
der which finally becomes indeterminate, from whitish passing into 
a brown, where it frequently becomes obsolete. Apothecia very 
small, black and scattered, mostly straight. Spores broadly el- 
lipsoid, and more or less tapering at one end, bilocular, decolo- 
rate, 14-148 mic. 
This plant was first found by Mr. H. A. Green, from whom 
I received the specimens, on the bark of Hamamelis Virginica, 
at Crowders Mountain, N. C., (J/elaspilea gemella, Esch.). 
GRAPHIS TENELLA, Ach. Thallus membranous, thin and 
slightly roughened, spreading and circumscribed by a well-de- 
veloped and prominent brown band of an extended hypothallus, 
from white or tawny ash-color verging into a pale olive. Apo- 
thecia simple, irregular and frequently broken, elevated and very 
prominent and convex, brown. Spores ellipsoid to sub-fusiform, 
pale brown, 5-6-locular, 18-%,° mic. ‘ 
So closely related is this plant to G. scripta that I have seen 
it distributed under that name, but the tropical origin, as well as 
other peculiarities, are convincing that the plant is truly distinct. 
It occurs on barks at San Luis Potosi, Mexico, Mr. C. G. Prin- 
gle, No. 168. 
GRAPHIS EGENA, (Nyl.). Thallus much as in G. nitida but 
often of an olivaceous yellow, thin membranous, opaque, aes 
Smooth, frequently broken by transverse fissures. Ser 
poorly developed, scattered, simple, and represented Assia 
white, mealy lines, which soon become expanded, exhibiting “ 
darker surface within. Spores broadly ellipsoid, bilocular, each 
containing one cell, 14-15 mic. Reaction red. 
_ This plant belonging to the section Fisswrina, may readily be 
misunderstood, yet the characters are such as to render it less 
misleading if found in well developed conditions. On barks, San 
Luis Potosi, Mexico. Mr. C. G. Pringle, No. 192. (/#ssurina 
esena, Nyl.). 
GRAPHIS ADSCRIBENS, Nyl. 
smooth and shining with a pincwha uneven surface, from a 
ashy to a greenish gray. Apothecia simple, small, ah me 
flexuous, more or less sunken or at length even with ape lor- 
_ Or hidden, sessile. Theca cylindrical, spores ellipsoid, decolo 
Thallus membranous, thinish, 
