IV CONTEXTS. 



PAGE 



Pilsbry, Henry A., Sc.D. A new species of Marinula from 



near the head of the Gulf of California 148 



A new Haitian Oligocene Horizon 487 



Land Mollusca of the Panama Canal Zone. Plate XXXVII . 502 



Pilsbry, Henry A., and Amos P. Brown. The Mollusca of 



Mandeville, Jamaica, and its Environs 510 



Pilsbry, Henry A., and J. H. Ferriss. Mollusca of the 

 Southwestern States: IV. The Chiricahua Mountains, 

 Arizona. Plates I-XIV 44 



Rehn, James A. (4. On the Orthoptera of Bermuda 3 



Some notes on Idaho Orthoptera, with the description of a 



new species of Trimeropteris 12 



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

 North American Species of the Genus Ischnoptera 



(Orthoptera) 407 



Records of Georgia and Florida Orthoptera. with the 



descriptions of one new species and one new subspecies.... 585 

 Preliminary Studies of North Carolina Orthoptera 615 



Sargent, C. S. Crataegus in Pennsylvania. II 150 



Smith, Burnktt. Notes on some little-known Fishes from the 



New York Devonian 656 



Smith, EdgarF. Some Berks County Minerals >. 538 



Southeran, R.. B.Sc. A new species of Enchytraeid Worm 



from the White Mountains 18 



Vanatta, E. G. Bermuda Shells 664 



Walker. Bryant. Variations of Polygyra albolabris in Michi- 

 gan 21 



Wherry, Edgar T., Ph.D. The Copper Deposits of Franklin 



and Adams Counties, Pennsylvania 454 



