Pink: lichens ok the lake superioh kegion 275 



462, 519 and 520. Snowbank lake area, July 26, 1897, no. 



957. 



Not previously reported from Minnesota. 



251. Staurothele drummondii Tuck. 



On rocks along the shore, frequent locally. Grand Portage 

 island, June 21, 1897, no. 72. 



Not previously reported from Minnesota and new to the in- 

 terior of North America. 



252. Verrucaria nigrescens Pkrs. 



On rocks, rare. Grand Portage, June 24, 1897, no. 184. 



253. Verrucaria epigaea (Pers.) Acii. 



On earth, rare. Snowbank hike area, July 26, 1897, no. 

 944. 



Not previously reported from Minnesota. 



254. Sagedia oxyspora (Nyl.) Tuck. 



On birch, rare. Beaver Bay, July 13, 1897, no. 697. 

 Not previously reported from Minnesota and new to the in- 

 |-erior of North America. 



255. Pyrenula punctiformis (Ach.) Naeg. var. fallax Nyl. 

 On trees, common. Gunfiint, June 30, 1897, no. 276. Mis- 



quah hills, July 5, 1897, no. 503. Snowbank lake area, July 

 21, 1897, no. 871, and July 26, 1897, no. 950. 

 Not previously reported from Minnesota. 



256. Pyrenula leucoplaca (Wallr.) Krb. 



On trees, common to west of region. Between Rose and 

 Rove lakes, June 27, 1897, no. 209. Gunfiint, July 2, 1897, 

 no. 391. Misquah hills, July 5, 1897, nos. 499 and 507. 

 Snowbank lake area, July 19, 1897, no. 828, July 20, 1897, no. 

 852, and July 26, 1897, nos. 955, 958 and 959. Ely, July 28, 

 1897, nos. 1009 and 1019. 



257. Pyrenula cinerella (Flot.) Tuck. 



On birch, common. Grand Portage island, June 21, 1897, 

 no. 56. 



The only American specimens seen by me which show the 

 spores as large as those of the European plant. Spores meas- 

 ured 12-18 by 6-9 mic. Spore measurements for the species in 

 America are more commonly 12-17 by 5-7 mic, my Iowa 

 specimens giving 12-16 by 6-7 mic, and T. A. William's from 

 Nebraska, 15-17 by '^Vi-'] mic 



Not previously reported from Minnesota. 



