466 PROCEEDINGS OF THE ACADEMY OF [1898. 



work in geology and paleontology, by Joseph Willcox on his work 

 in mineralogy, by Dr. James Darrach on his work in botany, and 

 by Dr. Edw. J. Nolan on his services to the Academy with comments 

 on his personal character. 



3. These are followed by a verbatim report of a conversation held 

 with Dr. Nolan, October 29, 1867, when Dr. Leidy related in detail 

 and with the exquisite candor and simplicity which were character- 

 istic, the details of his life up to that time. The notes were made 

 by Dr. Nolan immediately on the conclusion of the interview with 

 fulness and accuracy, and form a most interesting autobiographical 

 contribution to the volume, being much more intimate and detailed 

 than the texts of the published notices. 



4. Manuscript of the last paper contributed by Dr. Leidy to the 

 Proceedings of the Academy, 1891, pp. 234 et seq. 



5. Autograph letters, and " Notes upon daily scientific observa- 

 tions, commenced March 1, 1846." 



6. Letter from Dr. Levick regarding Dr. Leidy's last illness. 



7. Valedictory Address, March 27, 1858. 



8. Detailed index. 



Volume II. Botanical drawings and notes, including representa- 

 tions of plasmodia, algse (Diatoms, Schizophytes, Desmids, Proto- 

 coccus, Confervoids, Vaucheria), fungi, ferns and angiosperms. 



Volume III. Zoological drawings and notes. Infusoria (Flagel- 

 lata, Ciliata, Sectoria, Atricha, including forty-five originals of the 

 figures in the Freshwater Rhizopods of North America, Rhizopoda), 

 sponges, and one hundred and seventy-six unpublished illustrations 

 of gregarines from twenty-one hosts, a most valuable contribution 

 to a monograph of these parasites. 



Volume IV. Zoological drawings and notes, continued. Hydro- 

 zoa, ctenophors, bryozoa, worms (Platyelminthes, Nematilminthes). 



Volume V. Zoological drawings and notes, continued. Worms 

 (Annulata), arthropods, (Rotatoria, Crustacea, Arachnoidea, In- 

 secta), mollusks, fishes, reptiles, and mammals. 



The botanical material has been arranged by Dr. J. W. Harsh- 

 berger according to the classification of Warming's Handbook of 

 Systematic Botany, while the zoological drawings have been placed 

 by Dr. Nolan in accordance with Cams and Gerstaecker. Exhaus- 

 tive indexes have been prepared and bound with the volumes. 



Much the greater part of the drawings and notes have been 

 contributed by Mrs. Joseph Leidy, to whom the thanks of the 

 Academy are due for thus providing for the preservation of these 

 interesting relics of her distinguished husband. 



Dr. Leidy is unquestionably the most prominent figure in the his- 

 tory of the Academy. This distinction is due not only to the variety, 

 extent and value of his scientific work, but also because of his long 

 connection with the executive offices of the society, as fully set 

 forth in the several biographical notices included in the first volume 

 of the memorial. 



