10 THE NAUTILUS. 



I. Greegor, Jacksonville, Florida. Tritonidae. 



C. A. Hargrave, Danville, Ind. Unionidae. 



Geo. W. Harper, Cincinnati, Ohio. Land and Fre-bh Water shells 

 of North America. 



Dr. W. D. Hartman, West Chester, Pa. Partula, Achatinella 

 and Hellclna. 



A. A. Hinkley, Dubois, 111. StrepomatUlae. 



Prof. Josiah Keep, Mills College, Cal. West Coast Shells. 



Rev. A. B. Kendig, Brooklyn, N. Y. Amphidromus. 



F. R. Latchford, Ottawa, Ont. Linnaeldae of North America. 

 M. L. Leach, M. D., Wexford, Mich. Mollusks of Michigan. 

 W. Victor Lehman, Tremont, Pa. Unionidae. 



G. D. Lind, St. Louis, Mo. Helicidae. 



G. W. Lichtenthaler, Bloomiugton, III. West Coast Shells. 



Wm, A. Marsh, Aledo, 111. Unio)iidae. 



Geo. T. Marston, Green Bay, Wis. Wisconsin Mollasca. 



Chas. J. INIaynard, Newtonville, iNIass. Strophia. 



Wni. G. Mazyck, Charleston, S. C. North American Land Shells. 



Thomas Morgan, Somerville, N. J. 



James H. Morrison, Lexington, Va. Specific Variation. 



Wm. J. McGinty, Philadelphia, Pa. Marginellidae. 



Philip Nell, Philadelphia, Pa. Unionidae. 



H. A. Pilsbry, Philadelphia, Pa. La7id and Fresh Water shells. 



Wm. J. liaymond, Oakland, Cal. West Coast Land and Fresh 

 Water Shells and Tertiary and Quaternary Shell". 



John Ritchie Jr., Boston, Mass. Strombidae. 



S. Raymond Roberts, Glen Ridge, IST. J. Cypraeidae. 



Edward W. Roper, Revere, Mass, Cyrenidae. 



John Shallcross, Philadelphia, Pa. Volutidae. 



Prof Benj. Sharp, Philadelphia, Pa. Dentaliidae. 



Ida M. Shepherd, Long Branch, Cal. West Coast Shells. 



Prof. B. Shimek, Lincoln, Xeb. Ancylus and Succineidae. 



Chas. T. Simpson, Washington, D. C. Geographical Distribution 

 and Nomenclature. 



J. A. Singley, Giddings, Tex. Jjand Shells of North America. 



Sanderson Smith, Kew York, N. Y. Mollusca of N. W. Atlantic. 



Uselma C. Smith, Philadelphia, Pa. Conidae. 



Dr. V. Sterki, New Philadelphia, O. No. Amer. Pupidae and 

 Hyalinia. 



L. H. Streng, Grand Rapids, Mich. 



