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tains. From its similarity to Lecanora laevata Nyl. it is easily overlooked 
and so far as known, has not heretofore been reported from North America. 
LEcroEA (Section Biatora ) fuscescens Sommerf. 
Lecidea (Biatora) fuscescens Sommerf. Fries Li. Scand. I, 1871, p. 461. 
Biatoria fuscescens (Sommerf.) Th. Fr. Tuck. Syn. II, p. 25. 
Thallus crustaceous of minute, whitish or ashy grey, separate, flat 
scales scattered over a dark hypothallus; apothecia small, 0.3 to 0.5 mm. 
wide, disk dull black, when moistened dull brown, the margin thin, erect, 
dark ash colored or brownish black but finally disappearing and the disk 
then convex: epithecium subcontinuous, bluish-grey; thecium 0.048// high; 
paraphyses loosely coherent, hypothecium colorless; asci cuneate, 0.042// 
long and 0.010// thick; spores ip eight’s, colorless, simple, ovoid-ellipsoid or 
semi-globular, 0.006 to 0.010// long, and 0.004 to 0.007// thick ; hymenial gela- 
tine blue with iodine changing to sordid greenish-blue. 
On bark of Ribes hesprium in canons of Santa Monica Mts. 
Lecidea (Section Biatora) cadubriea (Mass) Nyl. 
Th. M. Fr. Li. Scand. I, 1871, p. 468. 
Thallus white, thin, effuse, subgranulose ; apothecia sessile, small, flat, 
black with a shade of red-brown, margin persistent, black; epithecium 
brown, granulose; thecium colorless, 0.060// high; paraphyses coherent, 
slightly capitate and brown at the tips; hypothecium colorless; asci nar- 
rowly clavate, about 0.044// high; spores in eight’s, ellipsoid, 0.008 to 0.010// 
long, and 0.0035 to 0.0040// thick ; hymenial gelatine blue with iodine, the 
globular heads of the paraphyses retaining their brown color. 
On Salix, Topanga Canon, Santa Monica Mts. 
Catillaria (Section Biatorina) lenticularis (Ach.) Th. Fr. var. vulgaris 
(Korb.) Th. Fr. 
Lecidea lenticularis Ach. f. vulgaris (Korb.) Leighton Li. Flor. Gr. 
Brit. 3d. ed. 1879, p. 335. 
Catillaria ( Biatorina ) lenticularis (Ach.) Th. Fr. a. vulgaris (Korb.) 
Th. Fr. Th. M. Fr. Lich. Scand. I, 1871, p. 568. 
Thallus crustaceous, dusky grayish-brown, thin, indeterminate, surface 
granular, no reaction with KHO or Ca(Cl O) 2: apothecia dull brownish- 
black, sessile, disk flat with a thin, slightly elevated, entire, concolorous 
margin, finally convex and immarginate; epithecium granulose, brownish- 
black; thecium colorless, 0.060// high, stained blue with iodine, but epithe- 
cium and hypothecium retaining their natural color; paraphyses subcoherent 
and finally free, with globular, dark brown heads ; hypothecium brown of 
lighter shade than the epithecium; asci clavate; spores in eight’s, bilocular, 
narrowly- or fusiform-ellipsoid, acuminate at both ends, 0.007 to 0.012// long 
and 0.002 to 0.004// thick. Medullary hyphae not stained by iodine. 
On schistose rock, Santa Monica Mts. 
Catillaria glauco=nigrans (Tuck.) Hasse n. comb. 
Biatora glauco-nigrans Tuck. Syn. N. A. Lich. II, 1888, p. 31. Asco- 
lichenes A. Zahlbruckner in Engler & Prantl, 1907, p. 129. 
