40 Memorias de la Sociedad Científica 



ses where two or more entirely dififerent subjeets were inclu- 

 ded in one heading, they were separated and entered as i£ se- 

 párate subjeets, the date and vehicle o£ publication remaining 

 tlie same. 



PhiJadelphia, 1899. 



EXPLANATION OF ABBREVIATIONS 



A. N. S. Pbila. Academy of Natural Sciences. 



A. P. S. American Pbilosopliical Society. 



Am. Nat. The Americaü Naturalist. 



A. A. A. S. American Association for tKe advancement o£ 



Science. 

 Am. Journ. Morphol. American Journal of Morpkology. 

 Bul. Builetin. "(1S86) 1887." or in index "—1887." indicates 



that a paper was read or presented to the Society in 1886 



and printed in the publication of tbe Society in 1887. 

 Pr. Proceedings, 

 Trans. Transactions. 

 Edit. Editorial, or matter not contributer over signature o£ its 



author. 

 U. S. g. and g. s. Terr. United States geological and geogra- 



pbical survey of the Territories. 

 G. andN. H. S. Can. Geological and Natural History Survey 



of Canadá. 

 Jr. Journal, 

 fr. from. 



Vertebr. Vertebrata. 

 Reptl. Reptilia. 

 E,ept. Report. 

 Rev. Review. 

 Ser. Series. 

 Mus. Museum. 

 Meas, measures. 

 An. annuaL 



