CONTENTS. 



KELI.ER, Ida A., Ph. D. The Coloring Matter of the Aril of Celastrus scan- . 



dens (Continued.) -"'' 



Rand, Theodore D. The Serpentines of Eastern Pennsylvania. . . 2J9 



Bascom, Fi^orence. Perido-Steatite and Diabase 219 



Allen, Harrison, M. D. A Biographical Sketch of John Adam Ryder. . 223 



Cook, O. F. Summary of New Liberian Polydesmoidea 257 



PiLSBRY, Henry A. A Remarkable Central American Melunian. . . 269 



Henry, Frederick P. Remarks on Filaria • 271 



DoLLEY, Charles S., M. D. The Planktonokrit.a Centrifugal Apparatus 



for the Volumetric Estimation of the Food -supply of Oysters and other 



Aquatic Animals. 276 



Allen, Harrison, M. D. The Ulna of thfe Common Brown Bat. . . 291 

 Fox, William J. Contributions to a Knowledge of the Hjmienoptera of 



Brazil. No. I, Scoliidse ' * ' "^^ 



Cope, E. D. The Mesenteries of the Sauria ' • 308 



PiLSBRY, Henry A. and E. G. VanaTTa. Catalogue of the Species of 



Cerion, with Descriptions of New Forms. (Plate XI) .... 315 

 PiLSBRY Henry A. and E. G. VanaTTa. Revision of the North American 



Slugs : Ariolimax and Aphallarion. (Plates XII, XIII, XIV) . 339 



RnoADS, Samuel N. Synopsis of the Polar. Hares of North America. 



(Plates VI, VII, VIII, IX, X) 351 



Cope, E. D. New and little known Mammalia from the Port Kennedy 



Bone Deposit ^^^ 



Dall, William HealEY. Insular Landshell Faunas, especially as illustra- 

 ted by the Data obtained by Dr. G. Baur in the Galapagos Islands. 



(PlatesXV, XVI, XVII) 395 



Cope, E. D. On the Hemipenis of the Sauria 461 



