iv CONTENTS. 



PAGE 



PiLSBKY, Henry A., and James H. Ferriss. Mollusca of the 

 Southwestern States. VII: The Dragoon, Mule, Santa 

 Rita, Baboquivari, and Tucson Ranges, Arizona (Plates 

 VIII-XV)...' 363 



Rehn, James A. G. A further contribution to the knowledge 



of the Orthoptera of Argentina 270 



Rehn, James A. G., and Morgan Hebard. The genus 



Gryllus (Orthoptera) as found in America (Plate IV) 293 



Smith, Burnett. The structural relations of some Devonian 



Shales in central New York (Plate XXII) 561 



Vanatta, E. G. Praticolella 194 



Rafinesque's types of Unio 549 



Wherry, Edgar T., and Samuel G. Gordon. An arrangement 



of minerals according to their occurrence 426 



Wright, Albert H., et al. A biological reconnaissance of 



the Okefinokee Swamp in Georgia (Plates I, II, III) 107 



