X TEXT-BOOK OF PALEONTOLOGY 



preface, and also in footnotes at the end of the several chapters. Their 

 names are enumerated below in the order of their respective sections, and the 

 Editor begs to express at this time a sense of his profound appreciation of the 

 Services that have been so generously rendered. For the many personal 

 courtesies extended, he would return to each of them his sincere and hearty 

 thanks. 



LIST OF COLLABORATORS 



Mr. Charles "Wachsmuth, Grinoidea, Blastoidea. 



Mr. W. Percy Sladen, Astero^wa, Echinowa. 



Dr. George Jennings Hinde, Vermes. 



Mr. Edward 0. Ulrich, Bryozoa, Ostracoda. 



Mr. Charles Schuchert, Brachiopoda. 



])r. William H. Dall, Pelecypoda. 



Prof. Henry A. Pilsbry, Gastropoda. 



Prof. Alpheüs Hyatt, Gephalopoda. 



Prof. Charles E. Beecher, TrUohita. 



Prof. John M. Clarke, Eucrustacea (pars), Äcerata (pars). 



Prof. John S. Kingsley, Eucrustacea (pars), Äcerata (pars). 



Prof. Samuel H. Scudder, Insecta. 



The Editor is also greatly indebted to his friend Dr. John C. Merriam, 

 who undertook the translation of the entire chapter on Mollusca, a very 

 laborious work. Dr. Merriam's assistance has been further enlisted in the 

 translation of the second volume, which will be devoted exclusively to the 

 Yertebrates. Dr. August F. Foerste Avas kind enough to furnish a transla- 

 tion of the chapter on Insects, and various friends have assisted in correcting 

 proofs. For the compilation of the index the Editor is indebted to Miss 

 Elizabeth B. Bryant, a former Student of his at KadclifFe College, and to 

 his brother, Mr. David P. Eastman. 



CHARLES E. EASTMAN. 



Harvard University, 

 SeiJtemher 15, 1899. 



