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Carolina (Mr. Ravenel). Also a Lecanoroid species, comparable now (as 
in Lindig n. 788) in general aspect, with conditions of the equally minute 
Lecanora subfusca, v. duplicata, Tuck. (Wright Lich. Cub. n. 119) and 
now (as in Mr. Ravenel’s specimens) rather with similarly reduced forms 
of L. atra. ——P. Ravenelii, Tuckerm.1 Trunks, on the southern coast 
of Texas (Mr. Ravenel). There can be no question of the Graphidaceous 
character of this species, which yet, together with more commonly, and 
perfectly lirelleform apothecia, offers also the irregularly rounded ones 
indicating the Lecanactidean type; and the fusiform spores of Platy- 
grapha. 
XLVIII.—MELASPILEA, Nyl. 
Nyl. Prodr. p. 170; Lich. Scand. p. 263; in Prodr. Fl. N. Gran. p. 111. 
Th. Fr. Gen. p. 98. Lecidee sp., Fée Ess. p. 107, t. 26, f. 6; Suppl. 
p. 103. Nyl. Lich. Par. n. 99. Lecanactidis sp., Fr. 8. O. V. p. 288; 
L. E. p. 377. Opegraphe f., Scher. Spicil. p. 331; Enum. p. 158. 
Abrothalli, dein Catillarie, dein Buelliz sp., Mass. Ric. p. 89, & opp. 
varr. Buellie sp., & Hazslinszkya, Koerb. Parerg. pp. 189, 257. 
Apothecia rotundata, 1. oblonga opegraphoidea, excipulo proprio 
nigro. Spore obtuse ellipsoide 1. soleformes, biloculares, fusces- 
centes 1. subincolores. Spermatia oblonga; sterigmatibus simplici- 
bus. Thallus crustaceus, uniformis, aut seepius obsoletus. 
This little group, founded upon two closely allied European lichens, 
has been extended by Nylander to include several South American 
species, one of which is found also in Texas. The type (JL. arthonioides) 
is not ill-comparable, as respects the present tribe, with Graphis patellula 
(Meissn.) Nyl., nor do the oblong, plurilocular spores of the latter express 
(as we look at them) anything more diverse from those of the former than 
a higher grade of evolution of the same type. There are however other 
differences; and the cited Graphis, compared as it must be with G. pezi- 
1 Platygrapha Ravenelii (sp. nova) thallo effuso tenui leproso 1. granulato 
cinereo-glaucescente ; apotheciis lirelleformibus (1™™-, 5-2™™- long.) rarius rotun- 
datis flexuoso-lobatis (circ. 1>™- lat.) sessilibus, nigris, albo plus minus suffusis, 
margine dein denudato tenui erecto. Hypothecium nigrum. Spore octone, 
Susiformes, quadriloculares, incolores, longit. 0,025-41™™., crassit. 0,005-6™™-. On 
various barks, Corpus Christi, Texas, Mr. Ravenel; to whom I take pleasure in 
dedicating the lichen. The rare, rounded or lecanoroid apothecia have the aspect of 
those of P. lewcopsara, Nyl., (Lindig Herb. N. Gran. n. 2887) to which however 
our plant is by no means so near as to P. dirinea, Nyl. (Dirina multiformis, Mont. 
&V.d.B. Herb. V. d. Bosch.) the spores of which (‘long. 0™™. 025, lat, Omm. 
0025, M. & VY. d. B. Lich. Jav.) I regret to have been unable to discover in my 
specimen. Reaction of the hymenial gelatine, in our Texan lichen, with iodine, 
vinous red. 
