(221 ) 
states, and I was unprepared therefore to recognize it in the often per- 
fectly lecanoroid, Californian lichen (Lecanora fecunda, Tuckerm. Lich. 
Calif. p. 20) referred here by Nylander (Syn. Lich. N. Caled. p. 60, not.). 
—— A. glaucescens, Nyl. in litt. Trunks, North and South Carolina (Mr. 
Ravenel). Also remarkable for its lecanoroid aspect. The lichen is near 
to A. velata. A northern form (New Jersey, Mr. Austin. New Bedford, 
Mass., Mr. Willey) comparable with both these species, differs yet in its 
larger spores, measuring ae micromill. —— A. velata, Nyl. (Prodr. p. 165. 
Zw. exs. 0. 48, exempli mei) f. develata, Nyl. Trunks in Hampshire, Mass. 
(Myself). New Bedford (Mr. Willey). ——A. cinereo-pruinosa, Scher. 
(Enum. p. 248, & Lich. Helv. n. 251). On Yellow Birch, in the White 
Mountains.— A. cupressina, Tuckerm.,! observed only on White Cedar, 
Mass. (Mr. Willey) is readily distinguished from the in some respects 
similar species next following, by the colours ; and differs also in its smaller 
spores. —— A. lecideella, Nyl. (A. glaucina, Tuck. in litt.). On various 
trees and shrubs, and also on dead wood, commonin New England. Ohio 
(Lea). Illinois (Mr. E. Hall). North Carolina (Rev. Dr. Curtis). Texas 
(Mr. Wright). 
North American species with black fruit. 
1. Spores bilocular. 
A. glebosa, Tuckerm.,? remarkable for its thallus, made up of turgid, 
glebous or irregular squamules, which are finally nodulose or somewhat 
plicate, much as in Buellia badia, has occurred in the Yosemite valley, 
California (Mr. Bolander). ——A. lurida, Ach. (Coniangium vulgare, Fr. 
L. E. p. 378; Lich. Suec.n.1). Dead wood in the White Mountains. 
Apothecia brownish-black. —— A. patellulata, Ny]. (Lich. Scand. p. 262, 
& in Fellm. Lich. Arct.n. 209). Trunksin the White Mountains (Myself). 
New Bedford (Mr. Willey).——A. dispersa, Nyl. (Lich. Scand. p. 261. 
Moug. & Nestl. Cr. n. 359). On shrubs, and trees, New Bedford, and 
Weymouth (Mr. Willey). 
1 Arthonia cupressina (sp. nova) thallo effuso tenuissimo leproso albido ; apo- 
theciis minutis (O™™., 2-0™™-, 4 lat.) rotundatis convexis e pallido-fuscescente dein 
obscuratis viridulo-suffusis. Hypothecium pallidum. Spore in thecis pyriformi- 
bus oblongo-ovatisve ovoideo-oblonge, quadriloculares (loculis subequalibus ) in- 
colores, longit. 0,011-16™-, crassit. 0,003-5™™-.— On White Cedar, New Bedford, 
Mass. (Mr. Willey). Reaction with iodine, blue. 
2 Arthonia glebosa (sp. nova) thallo ¢ squamutis bullatis levigatis dein plicatis 
fuscescentibus ; apotheciis rotundatis convexis (circ. O™™, 5 lat.) mox confertis 
confluentibusque nigris. Hypothecium fusco-nigrum, Spore in thecis pyriformi- 
bus octone, ovoidec 1. oblongo-ovoidee, biloculares medio constricte, dilute fusces- 
centes I. incolores, longit. 0,010-16™™., crassit. 0,005-6™-. Upon mosses on rocks, 
California (H. N. Bolander). The reaction of the hymenial gelatine with iodine is 
vinous-red. 
