IV CONTENTS 



PAGE 



PiLSBRY, Henry A. Description of a new echinoderm (Plate 



VIII) 206 



PiLSBRY, Henry A., and Amos P. Brown. The method of 



progression in Truncatella (Plate XIV) 426 



List of land and fresh-water moUusks of Antigua 429 



PouLTON, Edward B. Mimicry in North American Ij utter- 

 flies. A reply (Plate V) 161 



Reese, Albert M. The vascular system of the Florida 



Alligator (Plate XIII) 4ia 



Rehn, James A. G., and Morgan Hebard. A study of the 

 species of the genus Dichopetala (Orthoptera, Tetti- 



goniidse) ' 64 



On the Orthoptera found on the Florida Keys and in 

 extreme southern Florida, II 373 



Smith, Burnett. Morphologic sequences in the canaliculate 



fulgurs (Plate XXIV) 567 



Spaeth, Reynold A. The distribution of the genus Cyclops 

 in the vicinity of Haver ford, Pennsylvania (Plates 

 I-IV) 20' 



Stone, Witmer. On a collection of mammals from Ecuador ^ 



Thompson, Joseph C. Contributions to the anatomy of the 



Ilysiidse 285 



Vanatta, E. G. Land and fresh-water shells from eastern 



Canada 222 



Montana shells 367 



Wardle, H. Newell. Description of a Tsantsa in the 

 ethnological collection of the Academy, with notes on 

 another specimen (Plates VI, VII) 197 



