426 Ei). Tuckerman on North American Lichens. 
(nune albicantibus farinosis) apotheciis immersis disco nudo immarginato 
e rufo nigricante margine thallode tumidulo integerrimo cincto. 
Hab. Lime-rocks, Organ mountains, Texas, Mr. Wright! Mt. Car- 
mel, Mexico, Wright! Aiken, South Carolina, Mr. Ravenel! Appears 
to be distne from L. Schleicheri. 
L. pipnasrA, sp. nova, thallo crustaceo effuso subcontiguo Jevigato 
dein granclosc-verruc vuloso viridi-glaucescente ; apotheciis adnatis plano- 
convexis margine proprio tenui thallodeque mox demisso crenulato discum 
sig rg viridi- -pruiposum eee Di as cingentibus 
Trunks, Texas, Mr. Wright 
ic NIZA, sp. nova, thallo tartareo granuloso-farinoso glaucescente; 
apotticciis innatis, disco plano rubro-fusco, margine thallode elevato sub- 
integro thallo albidiori, 
Hab. Trunks, Brattleborough, Mr. Frost/ Akin as L. subfusea, but 
“quite different from any state of that species that | kno 
L. stperriis, sp. nova, thallo crustaceo crassiusculo “areolato-subequa- 
maceo plumbeo-cinereo squamis subeff uratis dein bullatis verrueseformi- 
bus, hypothallo nigro ; apotheciis appressis disco immarginato fulvo fer- 
a nigrescente nudo marginem thallodem tenuem incurvum demum 
excludente. 
Heb 
THELOTREMA SUBTILE , Sp. novas thallo crustaceo nae effuso 
pallido; apotheciis depresso-subhemispheericis subdifformibus dein scutel- 
liformi-marginatis apertura ampla, aveue interno discreto thallo albidiori 
laxo demum neo discum planum albo-velatum na igricantem 
cxsio-pruinosum margine albissimo “eaetralnaslith cingen 
Hab. ges. Bratleborough, Mr. Frost! Virginia, E. t. South Car- 
olina, syle Ravenel ! 
T. GRANULOSUM, sp. nova, thallo cartilagineo effuso leevigato verrucoso- : 
Rilices Psat, 2p ue hemispheerivis granulatis | apertura de- 
mum ampla irregulari submarginata, excipulo interno eg evanescen 
dissum depressum nigrum albo- -pruinosum arcte cingen Dr. 
ee Trunks of cypress, Louisiana, with T. 8, Fee, reds 
Hg Ravenetit, sp. nova, thallo crustaceo crasso corihcao-eartiaget 
apothec eciis 
crusta mox concrescente evanido aperturam puncti 
cingente discumque concaviusculum nigrescentem fovente. Spor 
soidex fuscz, C. Mr. 
6. Trunks of maple, hickory and other trees, Seif Canal, S. Dr. 
Ravenel! Alabama, Mr. Peters / Mississippi, Dr. tLe ok 
Hale ! ! The exciple resembling that of atrenk exe aie that Te 
is wanting, but the disk entirely that of Thelotrema, Dyas wale. 
Spores also accord. It has the habit of T. coneretum, 
PitopHoron, genus novum. Apothecia termin: alia 
aloidea, disco hypothecio crasso atro imposito, solida, strato m 
cepta. Spor ellipsoidew hyalinw. Podetia verticalia ¢ beatin 
simplicia estate subfistulosa e thallo horizontali granuloso-su 
ied rginata ceph- 
edullari re- 
Ser se 
aulescentia sub- 
