^ 



PROCEEDINGS 



OP THE 



iMERICAX PHILOSOPHICAL SOCIETY, 



HELD AT PHILADELPHIA, FOR PROMOTING USEFUL KNOWLEDGE. 



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Vol. XXI¥2 July to December, 1887. No. 126. 



X»vivi:<rr 



TABLE OF CONTENTS.' 



PAGE. 



A Contribution to the History of the Vertebrata of the Trias of 



North America. By E. D. Cope {icith two plates) 209 



Were the Toltecs an Historic Nationality? By Daniel G. Brinton. 229 

 Bicla's Comet and the Large Meteors of November 27-30. By 



Daniel Kirkwood 242 



Notices of New Fresh water Infusoria. By Alfred C. Stokes {icith 



a plate) ? 244 



Preliminary Report on the Vertebrate Fossils of the Uinta Forma- 

 tion, collected by the Princeton Expedition of 1886. By W. B. 



Scott and Uenry F. Oshorn (icith a cut) 255 



On the Systematic Position of the Mallophaga. By A. S. Packard 



( tcitJt. thirteen cuts) 264 



On the Reptiles and Batrachians of Grand Cayman. By Samtiel 



Oarman 273 



On West Indian Reptiles in the Museum of Comparative Zoology, 



at Cambridge, Mass. By Samuel Garman 278 



Memoir of Pliny Earle Chase. Bj Fhilip O. Garrett 287 



Octonary Numeration and its Application to a System of Weights 



and Measures. By Alfred B. Taylor 296 



On the so-called Alaguilac Language of Guatemala. By D. G. 



Brinton 366 



Tlie Classiflcation and Phylogeny of the Artiodactyla. By E. D 



Cope 377 



Biographical Notice of Isaac Lea, LL.D. By Joseph Leidy 400 



Stated Meeting, September 2, 1887 403 



Stated Meeting, September 16, 1887 410 



Stated Meeting, October 7, 1887 412 



Stated Meeting, October 21, 1887 414 



Stated Meeting, November 4, 1887 416 



Stated Meeting, November 18, 1887 417 



Notes on the Ethnology of British Columbia. By P. Boas 422 



Electrolysis of Lead Solutions. Determination of Boric Acid. Di- 



halogen Derivatives of Salicylic Acid. Barite. By Edgar F. 



Smith 428 



Stated Meeting, December 2, 1887 434 



Note on the Possible Existence of Fireballs and Meteorites in the 



Stream of Bielids. By Daniel Kirkwood 436 



On an Ancient Human Footprint from Nicaragua. By D. G. 



Brinton {with a plate) 437 



Stated Meeting, December 16, 1887 444 



llt^° It is requested that the receipt of this number be acknowledged. 



IW In order to secure prompt attention it is requested that all corre- 

 spondence be addressed simply "To the Secreta,ries of the American 

 Philosophical Society. 104 S. Fifth St., Philadelphia." 



Published for the American Philosophical Society 



BY 

 MacCALLA & COMPANY, 



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