62 — 
thecia elevated, sessile, 0.5 to 1 mm. wide, disk flat-concave to flat, at times- 
slightly rugose, with an erect, permanent, entire thalline margin, later becoming 
crenate. Epithecium continuous, chocolate brown and reddish brown, gradu- 
ally paling downward; thecium colorless below, 80 to 84^ high; paraphyses co- 
herent; hypothecium pallid; asci clavate, about equalling the thecium in height; 
spores linear, cylindric, some slightly fusiform, colorless, simple or two-celled, 
septum faint, 16 to 26 m long, 4.5 to 6 m thick, straight or slightly curved; hymen- 
ial gelatine blue with iodine. Sterigma remotely articulated, spermatia linear 
straight, 8 to iom long, ca Im thick. On shaded sandstone bowlders, Topanga 
Canyon, Santa Monica Mountains Type deposited with Dr. A. Zahlbruckner 
and in herbaria of S. M. S., and Hasse. 
Acarospora Californica A. Zahlbr. n. sp. in litt. 
Thallus of closely congregated, thick warts of pale chocolate color, faintly 
pruinose, 0.5 to 1 mm. wide. Apothecia one to three in a wart, deeply depressed, 
punctiform to elongate distorted. Epithecium continuous, light brown; thecium 
colorless, .08 m high; paraphyses simple, medium stout, loosely coherent, the 
apices conglutinated ; asci flask-shaped, upper part of membrane thickened, 
about reaching tops of paraphyses; spores numerous, colorless, globular to ovoid, 
4 by 3 m or 5 to 7 m long, by 3 m thick; hypothecium sordid pale straw-color; hy- 
menial gelatine with iodine blue. 
On granite at Palm Springs, at eastern base of the San Jacinto Mts. The 
writer is indebted to Dr. A. Zahlbrucker for the naming of the above species. 
Ravialina ceruchis DeNot. var. tumidula (Tayl.) Nyl. 
Thallus densely tufted, subterete, more slender than the species and more 
freely branching, repeatedly forked above' and terminating in slender terete 
points. The only specimen seen is sterile. On Catalina Island, apparently on 
rocks. Collected by Blanche Trask. Determination by Dr. R. H. Howe, Jr., of 
the Thoreau Museum. A similar form is found on the mainland at Newport bluffs. 
Ramalina linearis (Sw.) Ach. 
Loosely tufted from the base, narrowly linear, smooth, somewhat chan- 
nelled, distantly branching, laciniae from 2.5 cm. to 4 cm. long and about 1 mm. 
wide. Apothecia marginal, few and distant, 1. to 1.5 mm. wide, disk concave, 
pale flesh color;, spores bilocular, 14 to i6m long, 5 to 6 m thick, slightly curved. 
On twigs, San Gabriel range. Determined by Dr. R. H. Howe, Jr. 
Placolecania candicans (E. Fr.) A. Zahlbr. 
Thallus white, pulverulent, closely adherent to substratum, forming round 
patches from 1 to 2 cm. in diameter, rimose in center, round-lobed at circumfer- 
ence. KHO — . Apothecia elevated sessile, 0.5 to Im in diameter, with a thick, 
entire lecanorine margin surrounding the flat dull black, slightly pruinose disk; 
gonidial layer of the margin extending under the hypothecium; epithecium sub- 
continuous, grayish-brown; thecium colorless, ,90 to ioom high; paraphyses 
coherent, strict, septate or forked the tips slightly capitate and colored; hypo- 
thecium nearly colorless or tinged a faint yellow; asci clavate; spores oblong- 
ellipsoid, bilocular, 11 to 17 m long 4 to 5 m thick. Sterigma straight simple; 
spermatia staff-shaped 4 to 8 m long, Im thick. On calcareous rock. Catalina 
