1912. 



NATURAL SCIENCES OF PHILADELPHIA. 



599 



tera found on the Florida Keys 

 and in extreme southern Florida, 

 I, 235, 489. 



Report of Biological and Microscopical 

 Section, 559. 



Report of Botanical Section, 562. 



Report of Corresponding Secretary, 

 549. 



Report of Curator of William S. Vaux 

 Collections, 558. 



Report of Curators, 555. 



Report of Custodian of the Isaac Lea 

 Collection, 559. 



Report of Department of Mollusca, 

 558. 



Report of Entomological Section, 560. 



Report of Librarian, 551. 



Report of Mineralogical and Geo- 

 logical Section, 563. 



Report of Ornithological Section, 564. 



Report of the Recording Secretary, 

 545. 



Reports of Sections, 559. 



Shufeldt, R. W. Notes on a prehistoric 

 race of Yucatan (Plates XIX, XX, 

 XXI), 491, 492. 



Skinner, Henry. Mimicry in Boreal 

 American Lepidoptera, 7. Mimicry 

 in butterflies, 141. Report of Ento- 

 mological Section, 560. 



Smith, Benjamin H. On recent species 

 of Crataegus (no abstract), 6. 



Smith, Burnett. Observations on the 

 structure of some coral beds in the 

 Hamilton Shale (Plates X, XI), 

 447, 489. 



Spitzka, Edward Anthony. On the 

 production of light by animals (no 

 abstract), 7. 



Standing Committees, 1. 



Standing Committees, 1913, 568. 



Stone, Witmer. Fauna and flora of the 

 New Jersey Pine Barrens, 149. A 

 new Synallaxis, 365, 489. Report 

 of Ornithological Section, 564. 



Thompson, Will F. The protoconch of 

 Acmaea, 499, 540. 



Trotter, Spencer. The faunal divis- 

 ions of eastern North America in 

 relation to vegetation, 130, 142. 

 Biological aspects of population 

 (no abstract), 155. 



True, Frederick W. Description of a 

 new fossil porpoise of the genus 

 Delphinodon from the Miocene 

 Formation of Maryland, 7, 135. 



Tucker, Henry. Harmless and useful 

 "snakes (no abstract), 154. 



Vanatta, E. G. Phenacolepas malonei 

 n. sp., 151. A new species of Vertigo 

 from Florida, 445, 489: 



Yaughan, Thomas Wayland. On the 

 rate of growth of stony corals (no 

 abstract), 130, 142. 



Vaux, George, Jr. Appointment as 

 Solicitor of Academy. 



Verrill, A. E. The Gorgonians of the 

 Brazilian coast, 156. 



Von Ihering, H. Analyse der Siid- 

 amerikanischen Heliceen, 400. 



Von Wijhe, J. W., withdrawal of paper, 

 490. 



Wherry, Edgar T. Apparent sun- 

 crack structures and ringing-rock 

 phenomena in the Triassic Diabase 

 of Eastern Pennsylvania, Plate II, 

 156, 169. The Triassic of Pennsyl- 

 vania, 156. Silicified wood from the 

 Triassic of Pennsylvania (Plates 

 III, IV), 366, 489. Age and corre- 

 lation of the ''New Red '' or Newark 

 Group of Pennsylvania, 373, 4S9. 



Willcox, Joseph. Appointment as 

 Curator of William S. Vaux Col- 

 lections. Report of Custodian of 

 Isaac Lea Collection of Eocene 

 Mollusca, 559. 



William S. Vaux Collections, report 

 of Curator. 558, 



39 



