iy PREFACE. 



that figures of shells are included in the copperplates of Vol. III., while 

 those of genitalia and lingual dentition are to be found exclusively in 

 the lithographic plates now first offered. Thus there is a double system 

 of plates. 



In addition to those mentioned in the first and fourth volumes, I am 

 indebted for assistance in the preparation of this to Dr. J. G. Cooper, 

 Hay wood, Alameda County, Gal. ; Miss Annie M. Law, Philadelphia, 

 Term. ; Mr. W. G. Mazyck, Charleston, S. C. ; Prof. A. G. Wetherby, Cin- 

 cinnati, 0. ; Mr. 0. B. Johnson, Forest Grove, Or. ; Mr. Henry Hemphill, 

 San Diego, Cal. ; Mr. Sam. Powell, Newport, R. I. ; Mr. G. W. Tryon, 

 Philadelphia, Penn. ; Mr. F. Stein, Mt. Carmel, 111. ; Mr. H. S. Crooke, 

 N. Y. ; Mr. A. T. E. Lansing, Watertown, N. Y. ; Mr. R. E. C. Stearns, 

 San Francisco, Cal. ; Dr. W. H. Dall, Washington, D. C. ; Mr. W. W. 

 Calkins, Chicago, 111.; Mr. J. Gwyn Jeffreys, London; Mr. R. M. Byrnes, 

 Cincinnati, 0. ; Mr. Anson Allen, Orono, Me. ; Mr. A. W. Crawford, 

 Oakland, Cal. ; Mr. Arthur F. Gray, Dauversport, Mass. ; Mr. Charles 

 Dury, Cincinnati, 0. ; Dr. C. A. Millar, Cincinnati, 0. ; Mr J. T. Crans, 

 Indianapolis, Ind. ; Miss Lizzie Taylor, St. Paul, Minn. ; Dr. L. G. Yates, 

 California ; Mr. J. Matthew Jones, Halifax, N. S. ; Mr. E. Ingersoll, 

 Jersey City, N. J. ; Mr. W. G. W. Harford, San Francisco, Cal. ; Dr. 

 J. B. Elliott, Sewanee, Tenn. 



To Mr. Bland I am indebted for a continuation of the kindness which 

 has so greatly aided me during more than twenty years. 



W. G. BINNEY. 



BURLINGTON, N. J., June, 1878. 



