/ 



/L^,/ff7 PROCEEDINGS 



^ ^ ^ OF THE 



AMERICA]^ PHILOSOPHICAL SOCIETY. 



HELD AT PHILADELPHIA. FOR PROMOTI\G USEFUL OOWLEDGE. 



Vol. XXIV. January to June, 1887. No. 125. 



TABLE OF CONTENTS. 



PAGE. 



Critical Remarks on the Editions of Diego de Landa's Writings. 



By Daniel O. Brinton 1 



The' Facial Nerve in the Domestic Cat. By T. B. Stowell {with a 



plale) 8 



Obituary Notice of James R. Ludlow. By Richard Vaux 19 



Contributions from the Chemical Laboratory of the University of 

 Pennsylvania. No. XXIX. Contributions to Mineralogy. By 



F. A. Qenth {with one phototype plate and three wood-cuts) 23 



Synopsis of the Batrachia and Reptilia obtained by H. H. Smith, in 



the Province of Mato Grosso, Brazil. By E. D. Cope 44 



A Geological Reconnaissance of Bland. Giles, Wythe and portions 

 of Pulaski and Montgomery Counties of Virginia. By John J. 



Stevenson {with a map and two plates') 61 



The Triassic Mammals Dromatiierium and Microconodon. By 



Henry F. Osborn (with a plate) 109 



The Relation of Aerolites to Shooting Stars. By Daniel Kirkwood. Ill 

 Organic Variation Indefinite not Definite in Direction — an Outcome 



of Environment. By E. W. Claypole 113 



The Medical Mythology of Ireland. By James Mooney 136 



On the Henry Draper Memorial Photographs of Stellar Spectra. By 



Oeorge F. Barker (with a plate) 166 



Notes on the Surface Geology of South-west Virginia. By John J. 



Stevenson 172 



Tlie Signal Service Bureau. Its Methods and Results. By William 



Blasius 179 



Stated Meeting, December 17, 1S86 184 



Stated Meeting, January 7, 1S87 187 



Stated Meeting, January 21, 1SS7 190 



Stated Meeting, February 4, 1887 192 



Stated Meeting, February 18, 1887 195 



Stated Meeting, March 4, 1887 196 



Stated Meeting, March 18, 1887 198 



Stated Meeting, April 1, 1887 199 



Stated Meeting, April 15, 1887 201 



Stated Meeting, May 6, 1887 203 



Stated Meeting, May 20, 1887 206 



t^" It is requested that the receipt of this number be acknowledged. 



It^" In order to secure prompt attention it is requested that all corre- 

 spondence be addressed simply "To the Secretaries of the American 

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



Published for the American Philosophical Society 



BY 



MacCALLA & COMPANY, 

 NOS. 237-9 DOCK STREET, PHILADELPHIA. 



