AUTHOR'S PREFACE 



THIS first fascicle of the Ninth Part of the Treatise deals 

 with the general characters of the Craniate Vertebrates and 

 the two Classes, Cyclostomes and Fishes. I wish here to 

 express my gratitude to Sir Eay Lankester, Dr. G. A. Boulenger, 

 Dr. A. S. Woodward, and especially to Dr. K. H. Traquair, for 

 the help they have given me in its preparation. 



For those illustrations which are new I am directly 

 responsible, but for a large number of figures I am indebted 

 to the published works of other writers. My thanks, for 

 allowing me to use their blocks, are due to several authors, 

 publishers, and institutions. Among these may be mentioned 

 Dr. A. S. Woodward, Dr. B. Dean, the Trustees of the British 

 Museum, the India Office, the Smithsonian Institution, the 

 Royal Society of Edinburgh, the Zoological Society, the 

 Geologists' Association, the University Press of Cambridge, 

 Messrs. J. and A. Churchill, Messrs. Longmans, Green and Co., 

 Messrs. Swan Sonnenschein and Co., Messrs. Cassell and Co., 

 Messrs. Engelmann of Leipzig, and Messrs. Fischer of Jena. 



EDWIN S. GOODRICH. 

 January 1909. 



