199 



previously listed by his friend Sprague, of Boston, who turned 

 over to him his remaining material in i860 and asked him to 

 continue the work. In the eight years that followed, Frost suc- 

 ceeded in adding 263 species to Sprague's revised list of 678. 

 Only three of these additions were Boleti, and two of them were 

 omitted from the Amherst Catalogue, as foreign to New England. 



The second publication cited is a list of the 47 species of the 

 genus Boletus found in New England, 22 of which were described 

 as new. This is perhaps his most important work, judging from 

 the standpoint of publication, since it contains descriptions, and 

 not names only. 



The third catalogue, prepared in collaboration with Tucker- 

 man, is by far the most pretentious of his publications, being a 

 summary of his entire botanical knowledge regarding New Eng- 

 land mosses, liverworts, stoneworts, and fungi, so far as this 

 knowledge could be expressed in a mere list of species. The 

 work contains 98 pages, 44 of which are contributed by Frost, 

 36 of these being devoted to fungi. Under the genus Boletus, 

 46 species are listed, and one species each under StrobiloDiyces 

 and Fistulina. Of the 1,190 species of fungi listed, 60 were first 

 described by Frost, 40 of these being Boleti and gill-fungi. 



In the absence of more extensive and detailed published re- 

 sults, it is no doubt true that Frost's herbarium represents his 

 most valuable botanical work. This was retained by his family 

 for ten years after his death, and then deposited by them, in 1890, 

 with the Natural History Society of Brattleboro for a period of 

 twelve years, when it was decided to transfer the entire collection 

 to the University of Vermont. At that time the number of 

 cryptogams in the collection was estimated at from three to five 

 thousand specimens. 



Frost's botanical library, consisting of about lOO bound vol- 

 umes and various manuscripts and drawings, was also deposited 

 with his herbarium. Among his most helpful books on fungi 

 were some of the works of Berkeley, Cooke, Persoon, Fries, 

 Schweinitz, Rabenhorst, Tuckerman, and Peck. Sprague sent 

 him a number of his pen drawings of Agarics, and he had copies 

 of many colored figures of Boleti taken from published illus- 

 trations. 



