1898-1902. No. 21.] LICHENS. 



Pyrenocarpi. 



Verrucaria PERS. 



Verrucaria aethiobola WNBG. -- NYL. Scand. p. 272. Greenl. - 

 Over rocks. 



Verrucaria ceuthocarpa WNBG. TH. FR. Arct. p. 269. Greenl., 

 Spitsb. On rocks. 



Verrucaria epigaea ACH. Leight. Ang. p. 64. Greenl. Over 

 earth. E. P. S. N. King Oscar Land, Goosefjord (45). 



Verrucaria extrema TH. FR. TH. FR. Spitsb. 50. - - Spitsb. - 

 On stone. 



Verrucaria margacea WNBG. - TH. FR. Arct. p. 269. Spitsb. 

 Icel. On stone. 



Verrucaria tnaura (VAHL) NYL. TH. FR. Arct. p. 268. Greenl., 

 Spitsb., Icel. On stone. 



Verrucaria mucosa WNBG. TH. FR. Arct. p. 269. Greenl., Tcel. 



On rocks. 



Verrucaria nigrescens PERS. TH. FR. Arct. p. 267. Icel. On 

 rocks. E. P. S. N. King Oscar Land, Goosefjord (42). 



Verrucaria phaeothelena TH. FR. TH. FR. Engl. Pol. Ex. p. 366. 

 Am. On stone. 



Verrucaria rejecta TH. FR. - TH. FR. Spitsb. p. 50. Spitsb. - 

 On stone. 



Verrucaria rupestris SCHRAD. -- TH. FR. Arct. p. 271. Greenl., 

 Spitsb., Icel. On stone. 



Verrucaria striatula WNBG.- TH. FR. Arct. p. 267. Spitsb. - 

 On stone. 



Verrucaria umbrina ACH. -- LEIGHT. Ang. p. 52. Greenl. On 

 stone. 



Polyblastia MASS. 



PolyUastia bryophila LONNR. TH. FR. Poly. p. 18. Am., Spitsb. 



Over moss and earth. 



PolyUastia gelatinosa (Acn.) TH. FR. - TH. FR. Poly, p. 17. - 

 Spitsb. Over dead moss. 



PolyUastia gothica TH. FR. TH. FR. Poly. p. 25. Spitsb. Over 

 dead moss. 



PolyUastia helvetica TH. FR. TH. FR. Spitsb. p. 48. Spitsb. - 

 Over moss. 



