204 E. Tuckerman on North American Lichens. 
[Sricra WRIGHTH, sp. nova, thallo subcoriaceo adpresso lw- 
vigato viridi-glaucescente, laciniis rotundatis sinuato-incisis cre- 
natis subtus fuscis ambitu pallescentibus Acoantone open 
pencsoneave albis; apotheciis sparsis elevatis extus m mmil- - 
the broader forms of S. dam: amcorn nis; in its spores; 23 most 
markably, in gor oo in abundance, regular cyphellx: ; abich 
resemble those of S. fuliginosa, though also a . urceolate, 
as in 8. damecornis. The genus Ricasolia, ot., was origin- 
ally conniitated: to include the natural group of species to which 
ps ieee belongs, on a mistaken comparison of the apothecia 
f thes ies, with certain sional apothecia common 10 - 
ofhies meat of Sticta, which are now regarded, pou the publi- 
cation of Mr. Tulasne’s important researches, as morbid condi- 
tions, infested by a parasitic eryptogam. (Tulas asne, Maa sur les 
‘Lichens, p- 128, note.) The species ~tnéladed 3 in the group, agree- 
ing as they do in many obvious features, were also once sup- 
posed to be destitute of cyphelle, ‘and the greater part, and in 
cong the tropical ones, probably are so; but Fries and 
elise testify to the occurrence of this development, however 
rarely, in both the old species of the northern hemisphere, xii 
in the Japanese lichen, above- described, it is normal. 
yor cee not improbably be found to occur also in N orth 
me 
[PHyscia? WRIGHTH, sp. nova, thallo Schicuiatt imbricato 
tenui molliusculo polito pallide viridi eae) subtus albo 
venis minusculis promipul s villosis reticulato, hypothallo nune 
- crassiusculo byssaceo-lanuginoso deste laciniis planis ir- 
regulariter raulgfide lachiwttade ambitu latioribus palmatis, centro 
minus eG isidiomo his cylindricis obsitis; apo- 
theciis subcentralibus 5 a isco. plano luteolo margine 
crasso incurvo eons onions ‘dema flexuosis. Sporse 
—On trunks of trees in dense woods, in the mountains of Cuba, 
teoa eons Ascociscana, Tuck. herb. ie Tuckerm. 
suppl. &c. in Amer. Jou rn. Sci., xxv, p. 424, nee is some- 
thing in this curious ohn which Sugeest nity 
Psorom the genus is constituted by Dr. Milas, but aa 
faseescent, often a little curved and kidney-shaped, one-septate 
