202 



Mycologia 



correspondents at several different periods. Definite records of 

 these exchanges exist in a few cases. Some time previous to 

 1824 Schweinitz sent to Abram Halsey, an amateur botanist of 

 New York, a collection of fungi. 15 This collection the writers 

 have endeavored to trace but there seems to be no record of its 

 existence. Descendants of Halsey believe it to have been de- 

 stroyed by a fire in a Brooklyn Museum. 



In 1824 packages of fungi were sent to Hooker 16 and to Fries. 17 

 Those sent to Hooker are preserved in the herbarium at Kew 

 and Fries's specimens are in the herbarium at Upsala. 



Schweinitz's first gift of specimens of fungi to an herbarium in 

 this country seems to have been made in 1827 to the Academy 

 of Natural Sciences, Philadelphia. The exact date and manner 

 of this gift is made clear by the recent discovery in the letter 

 files of the Academy of the following note from Z. Collins. 18 



" The class Pyrenomyceti of Dr. Fries in fourteen genera of North Ameri- 

 can Fungi to-wit : 



Sphaeria Phacidium 



In upwards of 500 species. Deficient in 150 species. From the collection 

 of Mr. L. D. Schweinitz and by him presented to the A. N. S. through his 

 friend Z. Collins. March 20, 1827." 



Comparing the lists in Schweinitz's handwriting on the packets 

 in the collection with the above note it is evident that they agree 

 except that Collins omitted one genus, namely Prostemium, when 

 he listed them. A memorandum by Schweinitz on the last folder, 

 Number 10, says: " Summa Pyrenomycetorum 527 — Desunt 153." 



This collection is in ten small folio heavy paper wrappers with 



15 In an undated letter to Schweinitz Halsey thanks him for the " Highly 

 prized collection [of fungi] you have some time since sent me." Elsewhere 

 in the letter he says, "I have just received from Hamburg, the 1st vol. of 

 the Bryologia Germanica by Nees & Hornschurch, . . . just printed." The 

 date of this publication was 1823. 



16 Letter from Hooker dated July 2, 1825. 



17 Letter from Fries dated April 15, 1824. 



18 This note is in the file dated 1 826-1 840 under the letter " S." 



Lophium 

 Sphaeronema 



Hysterium 



Glonium 



Actidium 



Cytisporea 

 Phoma 



Actinothyrium 



Sacidium 



Leptostroma 



Dothidia 

 Rhytisma 



