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rious difficulties, and requiring patient and persevering labor, offers 

 an immense and exceedingly interesting field of study. A series of 

 years would be requisite to complete a catalogue of those found 

 within the borders of the United States. Fries, the well-known 

 author of a work on Fungi, mentions having found two thousand 

 species comprised within the limits of a square furlong. Their uni- 

 versality is very remarkable, and we find but few substances in 

 nature exempted from their inroads. Every tribe of plants pos- 

 sesses peculiar and characteristic species on the stem or leaf. 

 They are found upon bottles, cloth, thread, opium, roasted meats, 

 dead flies, pigs bristles, old stockings, and in other equally curi- 

 ous situations. Our furniture, clothing, fuel, books, food, in 

 short almost every object forms a congenial habitat for some 

 species or other of these vegetable growths. He had recently 

 been examining some cryptogamous plants detected upon the 

 title-page of a book which had been immersed in sea water, and 

 had recognized Aspergillus candidus, A. roseus, and Eurotium 

 herharioriun. Massachusetts is remarkably fruitful in Fungi, 

 and to these Mr. Andrews had particularly paid attention. 



Appended to Mr. Andrews's remarks were descriptions of 

 thirty-six species common to England and America. Mr. 

 Andrews's descriptions of the latter being placed in juxtaposition 

 to those of the former by the Rev. M. J. Berkeley, the differ- 

 ences between them were seen to be very slight. The following 

 is a list of the species described : — 



Genus Agaricus. 

 Agaricus muscarius, excelsus, procerus, hypothejus, emeticus, 

 ruber, piperatus, giganteus, conicus, oreades, corticola, cam- 

 pestris, semiglobatus, semiovatus, fimiputris, comatus, micaceus. 



Genus Cantharellus. 

 Cantharellus cibarius, cinereus, cornucopioides. 



Genus Polyporus. 

 Polyporus versicolor, betulinus, ulmarius. 



Genus Boletus. 

 Boletus granulatus, subtomentosus, calopus, luridus, edulis. 



