342 proceedings of the academy op [1886. 



October 5. 



The President, Dr. Leidy, in the chair. 



Twenty-four persons present. 



A paper, entitled " Observations on Multiplication in Amoeba;," 

 by Lillie E. Holman, was presented for publication. 



October 12. 



Mr. Chas. Morris in the chair. 



Twenty-two persons present. 



Notes on the Lichens in the Herbarium of the Academy. At a 

 meeting of the Botanical Section, held October 11, Dr. J. W. 

 Eckfeldt, to whom had been committed the task of examining 

 and arranging the Lichens in possession of the Academy, reported 

 the result of his work, which had extended over two years. 

 Besides the collections upon the shelves, made by Schweinitz, and 

 by him bequeathed to the Academy, and that received from the 

 late Prof Tuckerman, he had found stowed away among miscel- 

 laneous packages : 1st, a collection made by Thomas G. Lea, of 

 North American species, many without names, or incorrectly 

 named ; 2d, a small collection made by H. W. Ravenel, chiefly from 

 the vicinity of Aiken, or along the Santee Canal in South Carolina, 

 in all about 60 to 70 species ; 3d, a small collection of Arctic spe- 

 cies made by Dr. Hayes ; 4th, a small collection of European 

 species made by Parmentier at a very earl}^ date; 5th, a set of 

 Scotch Lichens from Mr. Manghen ; and a few scattered species 

 from various American collectors. To each of these collections 

 he had given a careful microscopic examination, and had named 

 and classified them on the basis of Prof. Tuckerman's Genera 

 Lichenum. He had also added to these from his own private 

 herbarium more than 400 species, both North American and 

 foreign. All these collections had been incorporated in one, and 

 occupy one of the cases in the lower room, as a nucleus for the 

 Academy's general collection of Lichens. 



For obvious reasons it had been deemed advisable to maintain 

 apart and undisturbed the t3'pe collections of Schweinitz and 

 Tuckerman, but a general catalogue has been prepared including 

 all, by which proper reference to the contents of each is facilitated. 

 He had, moreover, gone carefullj^ through the Schweinitzian col- 

 lection, and, while leaving the original names unchanged, had 

 indicated upon the outside of each packet such changes as are 

 required by the present state of knowledge. 

 The total number of species of Lichens now in the Academy's 



