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AMERICAN PHILOSOPHICAL SOCIETY, 



HELD AT PHILADELPHIA, FOR PROMOTING USEFUL KNOWLEDGE. 



Vol. XXIII. July, 1886. No. 123 . 



TABLE OF CONTENTS. 



PAGE. 



The Olaciation of Parts of the Wyoming and Lackawanna Valleys. 



By John 0. Branner (with two maps) 337 



On Two New Species of Three-toed Horses from the Upper Mio- 

 cene, with Notes on the Fauna of the Ticholeptus Beds. By 



E. D. Cope 351 



Vocabulary of the Selish Language. By W. J. Hoffman 367 



Discovery of the Thoracic Feet in a Carboniferous Phyllocaridan. 



By A. S. Packard (with plate) 380 



The Use of Oil in Storms at Sea. By Lieut. A. B. Wyckoff, U. S. N. 383 



An Obituary Notice of the Late George Whitney. By William Sel- 

 lers 388 



Sketch of the Geology of York County, Pennsylvania. By 



Persifor Frazer {with a map) 391 



The Beothuk Indians. Second Article. By A. S. Oatschet 411 



Composite Photography applied to Handwriting. By Persifor 



Frazer {with a plate) 433 



On the Structure and Affinities of the Amphiumidse. By E. D. 



Cope {with two plates) 442 



Stated Meeting, March 19, 1SS6 446 



Stated Meeting, April 2, 1SS6 * . . 448 



Stated Meeting, April 19, 18S6 451 



Stated Meeting, May 7, 1886 452 



Stated Meeting, May 21, 1SS6 454 



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