268 PROCEEDINGS OF THE AMERICAN ACADEMY 



Lecanora pinguis, sp. nov. : thallo crasso areolato-plicato sordicle 

 olivaceo-virescente intus pallido-sulphureo, hypothallo infuscato ; apo- 

 theciis majusculis adnatis disco mox turgido lutescenti-carneo subtiliter 

 pruinoso, margine tliallino tenui subcrenulato demum excluso. SporfB 

 in thecis clavatis octonte, incolores, ex ellipsoideo plus minus oblongfe, 

 simplices, limbat:Ti, sporobl. dein variabili, diam. 3-4° longiores. On 

 metamorphic sandstone rocks, at 2,000 feet, in Oakland county, Califor- 

 nia, Mr. Bolander. Thallus tartareous, often two lines in diameter, and 

 the thickest specimens, made up apparently of several successive layers, 

 reaching half an inch through, contiguous, the surface cracked into 

 irregular, coarse, convex areoles, which are often plaited, and become 

 sometimes effigurate at the circumference, and in young fronds, dull 

 olivaceous-green without, and pale sulphur-colored within, the hypo- 

 thallus being indicated by a purplish-brown discoloration. Apothecia 

 from half a line exceeding at length a line and a half in diameter, from 

 innate becoming superficial, and the pale-yellowish, at length a little 

 flesh-colored, obscurely powdery disk (which is pale within) turgid, 

 (much in the manner of conditions of L. vai'ia, \. polytropa), when the 

 thinnish, scarcely prominent, irregularly wrinkled or notched margin is 

 sometimes excluded. Spores iri*egularly oblong-ellipsoid, and oblong. 

 Spermogones scarcely a little prominent, with fuscescent ostioles ; the 

 spermatia needle-shaped and bowed. There is some appearance in 

 this lichen of a tendency toward the effigurate type of thallus, but it is 

 not marked, and there is nothing else to distinguish the plant from 

 Lecanora proper, where it is associable with the group represented 

 by L. varia. 



Urceolaria chloroleuca, sp. nov. : thallo tartareo rugoso e glau- 

 cescente flavido intus pallide sulphureo hypothallo albo ; apotheciis ex 

 urceolato margine proprio denticulato-fisso reflexo mox explanatis, 

 disco convexulo nigro cinereo-subpruinoso margine thallino integro 

 evanescente. Sp. 8n£e, ovoideo-ellipsoidete, mox fuscescentes, 4-8- 

 blastoa sporobl. irregulariter subdivisis, diam. 2 - 2j-° rarius 3° longiores. 

 On the earth (" Cuchillas de Bai'acoa ") in the island of Cuba, Mr. 

 Wright (Lich. Cub. n. 123). A distinct form (whatever its rank 

 may prove to be), contrasting sharply with the elegant specimens of 

 U. cinereo-ccBsia, (Sw.) Ach., of Lindig's New Granada collection (n. 

 2,503), but not quite so diverse from those of Wi'ight's Lich. Cub. n. 

 161. The spores of this last are perhaps longer, but in other respects 

 like those of both the others, as also of U. scruposa (Fr. Lich. Suec. n. 



