PREFACE. 33 



the first by Dr. Holmes, the second by Miss Richardson, and 

 the latter by Dr. J. S. Kingsley. Further, the article on Crustacea 

 in their text-book on Zoology, by Messrs. T. J. Parker and 

 W. J. Haswell, and the handy little history of the Malacostraca, 

 by the Rev. T. R. R. Stebbing, are largely drawn from. In 

 drawing from these works the accounts have been freely modi- 

 fied to suit such purposes as appeared desirable. 



The descriptions of species are drawn from New Jersey ma- 

 terial, whenever possible, and if no specimens are available, the 

 compiled description is credited to the particular author from 

 which it is taken. Often I have followed the sequence of char- 

 acters, etc., quite closely in cases where recent monographs treat 

 of groups, but in every case most of the characters have been 

 verified at the time of writing the description. The value of 

 such models seems to be in that they afford room for the extent 

 of variation noted. 



Special mention of thanks is here given, collectively, for the 

 works referred to above, besides numerous others, which, on ac- 

 count of the many titles, would be out of place if listed in this 

 connection. 



I am indebted to the Academy of Natural Sciences, of Phil- 

 adelphia, for the use of the collections and books. The collection 

 of this institution contains some of the most interesting historical 

 specimens dealing with the carcinology of New Jersey, and safe 

 to say many, if not all, of the indigenous Crustacea. Within the 

 past few years I have succeeded in adding a number of interest- 

 ing specimens myself from various localities in the State, as 

 well as from adjacent States. 



To many friends and associates, who have been mentioned 

 elsewhere, I am indebted for the acquisition of material, assist- 

 ance in collecting, or notes, etc. Dr. Henry A. Pilsbry has 

 kindly given me assistance with the barnacles. Mr. Witmer 

 Stone has offered notes and records of his collections made at 

 Point Pleasant. Dr. Richard J. Phillips has presented me with 

 material and notes from Corson's Inlet. Dr. Benjamin Sharp, 

 one time active in local, as well as general, carcinological work, 



3 MU 



