184 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



data. A few hours of study were also given on other dates not 

 now definitely in mind. In order to verify and complete the mass 

 of information secured in this fragmentary manner the authorities 

 of the Academy, upon presentation of the situation by Dr. Witmer 

 Stone, the acting curator, most generously transmitted all of port- 

 folio 38 and 39 of the original set, and the final portfolio of the 

 mounted set. These were received in Lafayette, Ind., the latter part 

 of April, 1917, and returned the latter part of February, 1918, in 

 exactly the same condition as when received. Owing to this in- 

 valuable opportunity for verification it is believed that the statistics 

 given in the following account are accurate within the limits of ordi- 

 nary error. 



It has been the privilege of the senior author to examine many 

 collections of micro-fungi, and he can say advisedly that the 

 Schweinitz collection shows great care in its labelling and arrange- 

 ment, and considering the vicissitudes of practically a hundred years, 

 in which the requirements of correspondents, the need of transmit- 

 ting specimens for examination, the later consultations by visiting 

 mycologists, the ravages of insects and the accidents incident to 

 handling by attendants, is in a remarkably good state of preserva- 

 tion. The packets would have been somewhat more secure, if they 

 had been folded after the modern manner by overlapping the edges 

 more and folding the ends in the reverse direction from that of the 

 sides. But as it is, there is little evidence that specimens have been 

 lost out, or intermixed to any harmful extent. To insure further 

 protection and facilitate examination in the future the senior author 

 in February, 1917, after consultation with Dr. Shear" and Dr. Wit- 

 mer Stone, placed each packet still containing any material, found 

 in the seven large gray envelopes marked Cccoma and Puccinia, 

 whether American or foreign, into small manila envelopes and 

 wrote the name on the front. Of the 140 numbers in the North 

 American list under the genera Cccoma (exclusive of the subgenera 

 Albugo and Ustilago), Puccinia, Phragmidium, Podisoma and Gym- 

 nosporangium, 103 are represented at this date by specimens in the 



■ Dr. Shear, of the Bureau of Plant Industry, Washington, D. C, and 

 the senior author are members of a committee from the American Phytopath- 

 ological Society to give whatever assistance may be possible in the preserva- 

 tion of the Schweinitz Herbarium. 



