68 CUMMINGS 



localities added, most of the specimens having been collected at 

 Cape Nome or St. Michael, where no collecting had been done 

 by the members of the Harriman Expedition. Summing up, we 

 find 84 species new to Alaska recorded in this list. Of these, 6 

 are reported in Dr. Nylander's list as occurring on the coast of 

 Siberia, 3 are new to America, and 2 are new to science. 



Reviewing briefly the previous collections made in Alaska, 

 we find that Hooker and Arnott l enumerate 16 species ; Babing- 

 ton, 2 21 species and varieties; Rothrock, 3 40 species; Hooper,* 

 4 species; Rothrock, 5 no species and varieties. The material 

 on which this last list is based was collected by Dr. T. H. Bean 

 in 1880, in Alaska and the adjacent region. Knowlton 6 adds 

 one species. In 1888 appeared Dr. Nylander's Enumeratio 

 Lichenum Freti Behringii. 7 The collection upon which this 

 was based was made by Dr. E. Almquist, who was connected 

 with the Expedition of the Vega. Dr. Almquist collected at 

 three points on the Asiatic coast, St. Lawrence Bay, Konyam 

 Bay, and Bering Island, while only two Alaskan stations were 

 explored, St. Lawrence Island and Port Clarence. Dr. Ny- 

 lander lists 197 species, 4 varieties, and 16 forms, a total of 

 217, the same number as in the present enumeration. In 

 comparing these lists, however, allowance should be made for 

 the well-known fact that Dr. Nylander was inclined to mul- 

 tiply species, while Professor Tuckerman, whose arrangement 

 I have in the main followed, showed a tendency to group some- 

 what varying forms under one specific name. In 1891, Miss 

 Grace E. Cooley collected in Alaska, the lichens being submitted 

 to me 8 for determination. The list numbers 31 species and 



1 Hooker and Arnott, in Botany of Beechey's Voyage to the Pacific and Beh- 

 ring's Strait, 133-134. 1841. 



2 Babington, Churchill, in Botany of the Voyage of H. M. S. Herald by See- 

 man, 47, 49. 1852-1857. 



'Rothrock, in Flora of Alaska, Smithsonian Report. 1867. 



4 Hooper, in Cruise of the Corwin. iSSi. 



5 Rothrock, in Proceedings of the United States National Museum, 1-9. 1884. 



6 Knowlton, in Proceedings of the National Museum. 1886. 



7 Nylander, William. Enumeratio Lichenum Freti Behringii, 1-91. 1888. 

 8 Cummings, Clara E., in Cooley, Miss Grace E., Plants Collected in Alaska 



and Nanaimo, B. C., July and August, 1891. Bull. Torr. Club, vol. xix, 248, 

 249. 1892. 



