CONTETSJ^TS. 



Wachsmuth, Chas., and Frank Springer. Revision of the 



Palieocrinoidea. Part II. Conclusion. (Plates 17. 18 



and 19). ' . 



Heilprin, Angelo. a revision of the Cis-Mississippi Ter- 

 tiary Pectens of the United States, .... 

 Heilprin, Angelo. Remarks on the Mollusean Genera 



Hippagus, Verticordia and Pecchiolia, .... 

 Redfield, J. H. On Hieraeium aurantiacum. 

 Redfield, J. H. Note upon Plantago elongata, Pursh., 

 McCooK, Rev. H. C. How Orb-Weaving Spiders make the 



Framework or Foundations of Webs, .... 

 Wood, Dr. H. C. On the Nature of the Diphtheritic Con- 



tagium, . . . . . . . . . 



Meehan, Thos. Notes on Mistletoes, 



Meeiian, Thos. Dimorphism in a Willow, .... 

 Ryder, John A. Occurrence of the same species of Protozoa 



on both sides of the Atlantic, ..... 

 Heilprin, Angelo. Note on the approximate position of 



the Eocene deposits of Maryland, . . . . 



Heilprin, Angelo. A revision of the tertiary species of 



Area of the Eastern and Southern United States, 

 Meehan, Thos. Color in Autumn Leaves, 

 Meehan, Thos. On Movements and Paralysis in the Leaves 



of Robinia, ......... 



Potts, Edw. The Genus Carterella vs. Spongiophaga Pottsi, 

 Meehan, Thos. Pilobolus crystallinus, . . . . 



Report of Committee appointed to prepare an expression 



of the Academy's appreciation of Dr. Ruschenberger's 



services to the Society, . 

 Meehan, Thos. Varying Influence of Heat on Flower-buds 



and Leaf-buds, .... 

 Chapman, Dr. H. C. On a fojtal Kangaroo and its mem 



branes. (Plate 20), 



Report of the President, ...... 



Report of the Recording Secretary, .... 



Report of the Corresponding Secretary, ... 

 Report of the Librarian, ...... 



Report of the Curators, ...... 



Report of the Biological and Microscopical Section, . 

 Report of the Conchological Section, .... 



Report of the Botanical Section, .... 



Report of tlie Entomological Section, .... 



Report of the Mineralogical Section, .... 



Report of the Professor of Invertebrate Paleontology, 

 Report of the Professor of Mineralogy, 

 Report of the Treasurer. 



Officers for 1882, 



Elections during 1881. .... 

 Additions to the Museum, 

 Additions to the Librarj', 



305 



416 



423 

 429 

 429 



430 



435 

 439 

 442 



442 



444 



448 

 454 



456 

 460 

 463 



465 



466 



468 

 41-2 

 485 

 486 

 48t 

 489 

 490 

 491 

 494 

 496 

 49T 

 498 

 499 

 502 

 505 

 505 

 506 

 511 



I k Tit SANSOM ST., PHIL^DELPnlJ 



