iv I'KKFACE. 



that figures of shells are included iu the copperplutes of Vol. III., while 

 those of genitalia aud lingual dentition are to bo found exclusively iu 

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

 of plates. 



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

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

 Haywood, Alameda County, Cal. ; Miss Annie M. Law, Philadelphia, 

 Tenn. ; 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, U. I. ; Mr. G. W. Tryon, 

 Philadelphia, Penn. ; Mr. F. Stein, Mt. Carmel, III. ; 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. AV. \V. 

 Calkins, Chicago, III.; 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, Danversport, 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. 



