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(Dr. Veitch) and as far as Wilmington, North Carolina (Rev. Dr. Curtis). 
——T. scoria, Fée, determ. Nyl. (T. Carolinianum, Tuckerm. Suppl. 1, 
p. 429). Also a tropical lichen, found here in the low country of Carolina 
(Mr. Ravenel) Alabama (Mr. Beaumont) Louisiana (Hale) and at Hills- 
borough, North Carolina (Rev. Dr. Curtis). I follow Nylander’s determi- 
nation of T. scoria, which includes, according to him, T. phlyctena, Fée. 
——T. pallescens (Fée) Nyl. (including, according to the latter author, 
beside the lichen originally so named, T. erubescens, T. Kunzei, and T. 
quassiecola, Fée) is near to T. scoria, and a specimen from North Carolina 
(T. pallescens, Mont. in litt.) proves in fact to be scarcely distinguishable 
from it. Other southern specimens (Texas, Mr. Ravenel) agree however 
very closely with the lichen first named (Lindig Herb. N. Gran. n. 2663). 
— T. catervarium (Verrucaria, Fée Ess. p.90, t.22,f.1. Nyl. Pyr.p.52). 
On bark, Brooklyn, Alabama, Mr. Beaumont. Belongs to a cluster of 
tropical lichens, of which Verrucaria heterochroa, Mont., and Pyrenula 
cartilaginea, Fée (e Nyl.) are other members, apparently better associable 
with Trypethelium (as compare states of T. pallescens and T. annulare, as 
also T. uberinum, T. ochrothelium and T. Columbianum, Nyl.) than with 
Pyrenula.——T. scorites (Tuck.) Nyl. iz Prodr. N. Gran. p. 128, not. 
(Verrucaria, Tuck. i litt.). On Hornbeam, North Carolina (Rev. Dr. 
Curtis). The specimen is too meagre, but the habit of the lichen apparently 
distinct. In the spores it nearly approaches the next. —— T. exocanthum, 
Tuck. in litt! Nyl.l.¢.p.127. Lowcountry of Alabama (Mr. Beaumont) 
and of Louisiana (Hale). Considered by Nylander as near to 7. pallescens ; 
but the spores associate it closely with the following. —— T. virens, Tuck. 
in Darlingt. Fl. Cest. Nyl.1.c. The most northern exhibition of Trype- 
thelium. Itoccursin Canada (Mr. Drummond) andis common in the White 
Mountains; and through the middle states (Dr. Michener) to Virginia; 
from which it extends southward to the low country of South Carolina 
(Mr. Ravenel) and Alabama (Mr. Beaumont).——T. Sprengelii, Ach. 
(T. Eleutherie@, Spreng.!) a tropical species, observed here in Louisiana 
(Hale). 7. virens is a coarser plant, and readily distinguishable; it is 
none the less near to the present, and was at first referred to it by Nylan- 
der. 
Sub-fam. 3.— PYRENULEI. 
Apothecia solitaria ]. nunc confluentia, perithecio atro. 
It is in the groups brought together in the sub-family before us that the 
1 Trypethelium exocanthum (sp. nova) thallo hypophleode ; stromate elevato ¢ 
hemispherico subgloboso intus albido ; apotheciis nigris. Spore in thecis clavato- 
cylindraceis 6-8n@, oblonge, 6-10-loculares, incolores, longit. 0,041-46™™., crassit, 
0,009-J2™™-, Trunks, in Alabama, and Louisiana. Height of the stroma varying 
from 1 to nearly 2mm. 
