PYREFOPSIS. 137 



orous ; with a punctifonn, impressed disk which becomes at 

 length dilated and lecanoriue. Spores ellipsoid and ovoid, sim- 

 ple and bilocular, decolorate, ^ mic. ; the capillary paraphyses 



at length distinct. Synalissa, Gen. Lich. p. 80. 



Granitic rocks, North Carolina (Curtis), Tnckerman I. c. 1872. 



Massachusetts and New Hampshire, Willey. Apothecia O mm -, 



3 to O mm -, 5 wide. 



The colour of the thallus, passing from blood-red into reddish- 

 brown, and no less the large internal cells each containing from 

 one to four gonimia (now exactly comparable with those of Om- 

 phalaria Pliylliscum) and the larger spores, separate this from 

 the last ; which is however unknown as yet except at its original 

 station j and its range of variation therefore uncertain. 



5. P. phylliscina, Tuckerm.; thallus thin, made up of very 

 minute, brownish-black granules which are collected in an irreg- 

 ular, filmy crust; apothecia minute, globose, almost closed (Ver- 

 rucaria3form). Spores in sub-fusiform thekes, ovoid-ellipsoid, 

 simple and bilocular, decolorate, 9 ^J- mic. ; the paraphyses few 

 and short. Synalissa, Gen. Lich. p. 80. 



Granitic rocks, New Bedford ( Willey}, Tuckerman I. c. 1872. 



Spermatia filiform, bowed. In this respect, as in the inexpli- 

 cate, globular apothecia with the disk represented only by what 

 seems a Verrucariine ostiole, and the fusiform thekes, the licheii 

 reminds us of Omphalaria Phylliscum ; nor are the large go- 

 nimia ill-comparable with those of that. Apothecia O mm -, 2 to 

 O mm -, 3 wide. 



* * Gonimia disposed in chains. 



6. P. corallina, Willey; thallus coralloid, the pyriform, re- 

 tuse granules becoming elongated, nodulose, and irregularly 

 short-branched ; and constituting finally a broken-areolate, dark- 

 olivaceous (and blackening) crust; apothecia minute, globose- 

 lecanorine ; with a coarctate, impressed disk. Spores ellipsoid, 

 simple, decolorate, ^ mic. ; the capillary paraphyses finally 

 distinct. Willey, msc. 



On stones (granitic) near the ground in boggy places, on the 



coast of Massachusetts, Willey. Chains of gonimia of 3-9 



members. 



7. P. viridi-rufa, Tuckerm.; thallus of rounded granules 

 which are soon grouped in areole-like clumps, and crowded to- 



