414 PROCEEDINGS OF THE AMERICAN ACADEMY 



habit of the apothecia, may be considered as analogous to Thelotrema, 

 as here taken. 



Gtalecta asteria, sp. nov. : thallo contiguo rimoso dein granu- 

 loso-verruculoso g'.aucescente ; apotheciis minutis superficiahbus de- 

 presso-globosis thallo adscendente subvestitis, excipulo connivente 

 radiato-rugoso albido-carneolo deraum denudato nigricante porifbrmi- 

 aperto discum subnucleiformem incolorem fovente. Thecaj elongatna, 

 subcylindraceo-clavatae, polysporge. Sporae parvulae incolores ex ovoideo 

 ellipsoidete regulariter djblastro diam. 1^ - 2^-plo longiores. On shrubs, 

 Santiago, island of Cuba, Mr. Wright. Thallus well developed, be- 

 coming granulose-verruculose, glaucescent ; the sometimes radiant 

 hypothallus from white becoming brownish at the edge. Apothecia 

 minute, superficial, globular, clothed more or less by the thallus, a pale 

 flesh-colored proper exciple, which is connivent and radiately notched 

 above, opening by a pore-like aperture, and enclosing a nucleiform 

 colorless disk. With age the exciple becomes denudate above and 

 brownish-black, which is seen, in section, to be the color of the whole 

 interior portion. Spore-sacks poly- (12 — 20-) sporous. Spores small, 

 colorless, simple at first, but becoming regularly diblastish ; the out- 

 line varying from ovoid to ellipsoid, and the length from once and a 

 half to twice and a half exceeding the width. Nearest, in aspect, to 

 the following s[)ecies ; but remarkably distinguished by its blackish ex- 

 ciple, the color of which is concealed below by the ascending thallus, 

 and above by a paler vestiture, which is cleft, pretty regularly, into 

 portions appearing to radiate from the pore-like aperture ; also by 

 the spores. 



Gyalecta absconsa, sp. nov. : thallo tenuissimo leprbso albido ; apo- 

 theciis minutis mox superficiahbus thallo vestitis excipulo urceolato car- 

 neo-rubello margine incurvo radiato-crenato discum pallidum cingente 

 Thecae subcylindraceag, octosporae. Sporas incolores, primo ellipsoidea;, 

 diblastae, dein lato-fusiformes, tetrablastie, septis vix irregularibus, diam. 

 2j - 3|-plo longiores. On trunks of red maple, in the low country of 

 South Carolina, accompanying Arthonia spectabilis, Flot. ; Mr. Ravenel. 

 Near to G. abstrusa (Wallr.), Arn. ((?, Wahlenhergiana,\^r. truncigena, 

 Ach.), and the apothecia of about the same size, but more prominent, less 

 open, and higher-colored, with a whitish (pruinose ?) disk, and, except 

 the radiately-cleft margin, always loosely clothed by the thallus. The 

 spores of G. abstrusa (Herb. Borr. ; Zw. Exs. n. 80) are not unlike those 

 of G. ciipularis, having an equally irregular internal configuration ; and 



