Acknowledgments 



I am indebted to many persons for study material of caprellids; 

 to them I offer my sincere gratitude. In particular I should like to 

 thank Dr. Torben Wolff (Universitetets Zoologiske Museum, Copen- 

 hagen) for lending me many of Mayer's types, without which the 

 value of this paper would be greatly diminished. I am grateful to 

 Dr. Roland Wigley (Bureau of Commercial Fisheries Laboratory, 

 Woods Hole) for the use of his caprelUd collections by the R,V Gosnold 

 from the entire Atlantic coast of the United States. These provided 

 invaluable information on the distribution of many species and 

 contributed several new records and a new genus. To Dr. P. Wagenaar 

 HummeUnck (Zoologisch Laboratorium, Utrecht) special thanks are 

 due for making available his collection of the virtually unstudied 

 West Indian capreUids. Dr. E. L. Bousfield (National Museum of 

 Canada, Ottawa) has aided a great deal by lending me his collection 

 from the Atlantic coast of the United States and by making helpful 

 suggestions diu*ing this research. 



Drs. T. E. BowTiian, H. H. Hobbs, Jr., and F. A. Chace, Jr. of 

 the Division of Crustacea at the Smithsonian Institution were es- 

 pecially helpful by reviewing the manuscript and acting as members 

 of my consultative committee at The George Washington University. 



This study was made possible by a grant from the Smithsonian 

 Institution Research Foundation and by a grant-in-aid-of-research 

 from the Society of Sigma Xi. 



VI 



