Shear & Stevens: Schweinitz Collections of Fungi 341 



in ithe sheets showing apparently that the specimens were placed 

 there by Michener but have since been removed. 



During 1885 and 1886, Dr. J. W. Eckfeldt, of Philadelphia, 

 critically examined and arranged the lichens in the herbarium of 

 the Philadelphia Academy of Science. At this time the type col- 

 lections of Schweinitz and Tuckerman were kept separate from 

 the others and undisturbed. A general catalogue was, however, 

 prepared in order to facilitate reference to these collections. Dr. 

 Eckfeldt lists 462 species as occurring in the Schweinitz collection 

 of lichens (1, p. 342). 



It is evident that Tuckerman at some time made careful study 

 of the lichens of the Schweinitz herbarium, for in Michener's 

 list of lichens of Chester County (36, p. 451) Tuckerman, who 

 prepared the descriptions of new species for this list, cites, as a 

 new species, Endocarpon arbor eum, Schweinitz, MS., and in his 

 North American Lichens (45, p. 148) he says, " Cladoma cetra- 

 rioides, Schwein. herb. (Tuck. Suppl. 1, 1. c. p. 427) is still only 

 known to me in the original specimens (from North Carolina) of 

 Schweinitz." 



Ellis's studies of fungi in the Schweinitz collections, (22, 23) 

 were all made, according to Mr. Stevenson, at the Academy. The 

 later paper was apparently based on fungi from the " Collins 

 Collection," which was found in 1894 in the herbarium of the 

 Academy of Natural Science where it " had lain unnoticed for 

 many years." 



Durand (21) in preparing his monograph of the Geoglssaceae 

 of North America studied Schweinitz's types in the herbarium 

 at Philadelphia. 



Lloyd (35) after " several visits" to Philadelphia for the pur- 

 pose of studying Schweinitz's specimens published a revision of 

 a number of species. Lloyd's conclusions as to ithe material on 

 which the work of Berkeley and Curtis was based are evidently 

 erroneous, as shown by the correspondence cited above. 



In connection with their studies of the genus Endothia the 

 writers have recently published (41) a discussion of the specimens 

 collected by Schweinitz, based partly on specimens in the Phila- 

 delphia herbarium. 



Berkeley and Curtis, Billings, Stevenson, Ellis, Tuckerman, 



