NOTES ON THE MARINE COPEPODA AND CLADOCEKA OF 

 WOODS HOLE AND ADJACENT REGIONS, INCLUDING 

 A SYNOPSIS OF THE GENERA OF THE HARPACTICOIDA. 



By Richard W. Siiarpe, 

 Department of Biology, DcWitt Clinton High School, New York City. 



There are but few reports on the marine Entomostraca of the east- 

 ern shores of North America, Thompson and Scott in 1897 pub- 

 lished studies on some collections made in the Gulf of St. Lawrence, 

 and in 1900 Prof. W. M. Wheeler, now of Harvard University, made 

 the first contribution of importance since the time of Dana. In 1906 

 and 1907 Dr. L. W. W T illiams of the Harvard Medical School reported 

 studies on species from the Narragansett Bay region of Rhode Island. 

 In this report Doctor Williams lists twenty-six free swimming Cope- 

 pods, while Wheeler records thirty from the Woods Hole region, and 

 Thompson and Scott mention eight from the region about the mouth of 

 the St. Lawrence. 



The notes herein recorded are taken from material brought together 

 by the U. S. Bureau of Fisheries schooner Grampus and from other 

 collections mostly made in the littoral zones of the Woods Hole region. 

 Little remains to be added in a paper of this sort to Wheeler's report 

 on the pelagic forms. 



It is perhaps unnecessary to add that these notes are at best very 

 incomplete. They represent the partial results of a five weeks' use 

 of a table at the U. S. Bureau of Fisheries laboratory at Woods Hole, 

 Massachusetts. 



A dichotomic synopsis of the genera of the Harpacticoida is inserted 

 following the text, in the hope that it will prove useful in the study of 

 these very minute and difficult forms. Very little has been done along 

 this line. Much of the data used is taken from Dr. G. O. Sars' Crus- 

 tacea of Norway, vol. 5, Harpacticoida. The writer herewith ex- 

 presses his high esteem for Doctor Sars' splendid work, without which 

 the compilation of a synoptic table anywhere near up to date would 

 have been an impracticable task. 



I also take much pleasure in expressing my sincere appreciation 

 of the courtesies extended me by Dr. F. B. Sumner, director of the 

 Woods Hole Station; and to Dr. F. A. Lucas, curator in chief, and Mr. 

 E L. Morris, curator, department of natural science, and to Miss 



Proceedings U.S. National Museum, Vol. 38— No. 1758. 



id.", 



