576 



PROCEEDINGS OF THE ACADEMY OF 



the family Desmoguatliidjie 

 (Plate XrV), 299, 316. 



Morsell, Rev. William F. C. 

 Dynamic evolution, or form 

 as a result of motion, 217, 

 465. 



Museum, additions to, 552. 



Nolan, Edward J., report of 

 Recording (Secretary, 531. 

 Report of Librarian, 535. 



Oberholser, Harry C. Some 

 untenable names in orni- 

 thology, 178, 201. 



Officers for 1 900, 550. 



Ornithological Section, report 

 of. 548. 



Pilsbry, Henry A. A new and 

 little-known species of Pristo- 

 loraa (Plate IX), 178, 185. 

 A new Australian Eulima 

 (Plate XI), 226, 258. Rela- 

 tions of the laud molluscan 

 fauna of South America. 226. 

 Notes on a few northwest 

 American land snails, 299, 

 314. A new Ampullaria, 

 365. Descriptions of New 

 Mexican land and fresh-water 

 mollusks, 365, 391. New 

 species and varieties of mol- 

 lusks from Miami, Fla., 379, 

 403. Confirmation of the 

 generic character of Ashmu- 

 nella, 379. A new species of 

 Thersites, 465, 473. Addi- 

 tions to the Japanese land 

 snail fauna (Plate XXI), 497, 

 525. Notes on some South- 

 ern Mexican shells, 497. Re- 

 port of Conchological Sec- 

 tion, 542. 



Pilsbry, Henry A., and T. D. 

 A. Cockerell. Ashmunella, 

 a new genus of Helices, 178, 

 188. 



Pilsbry, Henry A., and E. 

 G. Vanatta. Morphological 



[1899. 



and systematic notes on South 

 American Achatinidre (Plates 

 XV, XVI), 300, 366. 



Rand, Theodore D. Notes on 

 the geology of southeastern 

 Pennsylvania, 406. Report 

 on AVilliam S. Vaux Collec- 

 tions, 541. Report of Min- 

 eral ogical and Geological 

 Section, 547. 



Recording Secretary, report 

 of, 531. 



Report of Biological and Micro- 

 scopical Section, 541. 



Report of Botanical Section, 544. 



Report of Concholoa-ical Section, 

 542. 



Report of Corresponding Secre- 

 tary, 534. 



Report of Carators, 538. 



Report of Entomological Sec- 

 tion, 544. 



Report of Librarian, 535. 



Report of Mineralogical and 

 Geological Section, 547. 



Report of Ornithological Sec- 

 tion, 548. 



Report of Recording Secretary, 

 531. 



Repoi't on the William S. Vaux 

 Collections, 5ll. 



Sharp, Benjamin, report of Cor- 

 responding Secretary, 534. 



Skinner, Henry. On the rela- 

 tion of insects to disease (no 

 abstract), 218. Report of 

 Entomological Section, 544. 



Smith, Charles E. Presentation 

 of portrait in oil of Carolus 

 Liumeis, 498. 



Sommerville, James ]M., an- 

 nouncement of death of, 217. 



Stone, Witmer. A study of 

 the type specimens of birds in 

 the collection of the Academy 

 of Natural Sciences of Phila- 

 delphia, with brief history of 



