PKEFACE. 



of fossils are due; indeed, I do not recall the publication of a single book within 

 the past twenty years so necessary and useful to the geologist and palaeontolo- 

 gist." 



Prof. John H. Klippart, of Columbus, Ohio : 



"I like the work very much. It is just such a work as I have long since 

 very much needed. It will prove to the student of fossils what Webster's un- 

 abridged proves to the scholar — that it is simply indispensable. There is no 

 work to take its place, or that can be substituted for it." 

 Prof. G. C. Broadhead, of Missouri : 



" I find it a useful book for a student of palaeontology, and it supplies a 

 necessity which experience has demanded." 



Prof. Henry G. Hanks, of California : 



"I am very much pleased with the work. It is just what I want." 



Prof. R. H. Holbrook, of New Jersey : 



"I consider it a valuable work worth many times the price." 



Rev. J. Allen, President Alfred University, Pa. : 



"We find your book a very valuable production — a great aid." 



Prof. J. W. Dawson, of Montreal: 



" I have found the book very useful, and hope you will follow it up with 

 supplements as new species are described." 



Prof. G. Lindstrom, of Stockholm, Sweden : 



"I bought your excellent catalogue of the North American Palaeozoic 

 Fossils, for use in the Museum, and I dare say that scarcely a day passes by 

 without my consulting it." 



The notices this book has received in scientific periodicals have been no less 

 flattering, as will be observed in the Annals and Magazine of Natural 

 History, 1878, 5th ser., vol. i., p. 99, and the Geological Magazine of London, 

 for October 1877, p. 472. 



Under these circumstances, I have been induced to prepare a supplement, 

 for the unbound copies remaining on hand, and to publish it in this form for 

 a second edition. The supplement contains the genera and species de- 

 scribed since 1877, those that were overlooked in the first edition, corrected 

 references of species to genera, corrections of the more serious mistakes and 

 typographical errors, and a new index of the genera. The Vegetable Kingdom 

 is arranged in orders and classes, the Class Echinodermata is re-subdivided, 

 some new orders and new families are briefly defined, and a few specific names 

 have been proposed by the author for those preoccupied, which constitute the 

 new features of the supplement. In addition to the corrections, the fossils 

 described in the 23d and 24th Reports of the Reg. of the Univ. of N. Y., on the 

 condition of the St. Cab. of Nat. Hist., should be accredited to Hall and 

 Whitfield, instead of to Hall alone, and the Cincinnati Group should, in all 

 Cases, be stricken out, and, in nearly every instance, the Hud. Riv. Gr. inserted, 

 a few species only being referable to the Trenton and Utica Slate. 



S. A. MILLER. 

 Cincinnati, Ohio, December, 1882. 



