0. T. Mortensen), Dr. R C. Osburn, Dr. R. S. Bassler, 

 Dr. W. G. Van Name, and Mr. L. C. Brownell. 



Permission to copy certain published illustra- 

 tions, either by photographing' or drawing, has kind- 

 ly been granted by the United States Bureau of Fish- 

 eries, the Carnegie Institution of Washington and 

 the Museum of Comparative Zoology of Harvard 

 University. 



The drawings of Plates 2, 3, 11, 13, Fig. 2, as 

 well as the map were made by Mr. Walter Ziomek 

 of the New Jersey State Museum and those of Figs 

 5, 8, 9 and 10, by Mr. John Boczek. 



Unfortunately, space will not permit the 

 acknowledgment of all who have aided in the prepa- 

 ration of the book — the collecting and the study of 

 the material as well as the task of preparing the 

 manuscript and the plates for publication. 



