Fink: THE LICHENS OF MINNESOTA. 701 



57. Cladoiiia cristatella Tuck. 



On dead wood. Sweetheart island. June, 1894, no. 298. 

 Main land, Huggins landing, July, 1894, no 1593. Small 

 island south of Little Oak island, July, 1894, no. 17266. 

 Big island, July, 1894, no. 2213. Flag island, Aug., 

 1894, nos. 2893, 2894a and 28966. American islands, 

 July. 1896, no. 38. 



58. Biatora atropnrpnrea (Mass.) Hepp. 



On bark of Populus. American islands. July. 1896, 

 no. 13. 



Thallus thin, membranous, whitish, becoming scurfy; 

 apothecia rather small, adnate, disk a little convex and 

 becoming somewhat rough, pale within. Spores ellip- 

 soid, simple. Y V* mik. 8 in asci. 



The plant is placed here provisionally. 



Not previously reported from Minnesota. 



59. Biatora rubella (Ehrh.) Rabenh. 



On trees and dead wood. American islands. July, 1896, 

 no. 12. 



Spores 4 ; 5 z 6 /mik, the longest being 10 mik. longer than 

 Tuckerman's measurements, as are those of the Eu- 

 ropean plant. 



Not previously reported from Minnesota. 



60. Lecidea enteroleuca Fr. 



On trees. American islands, July, 1894. no. 22736. 



61. Buellia parasema (Ach.) Th. Fr. 



On trees. American islands, July, 1896, no. 14. 



62. EndocarpoD fluviatile DC. 



On submerged rocks. Massacre island, July, 1894, no. 

 2622a. American islands, July, 1896, no. 26. 

 Not previously reported from Minnesota. 



