THE CRUSTACEA OF THE ORDER CIBLA^CEA IN THE COL- 

 LECTION OF THE UNITED STATES NATIONAL MUSELTM. 



By William T. Calman, 



Of the British Museuvi {Natural History), London, England. 



I 



INTRODUCTION. 



Some seven years ago Dr. Richard Ratlibiin was good enough to 

 entrust to me for examination the entire collection of unidentified 

 Cumacea belonging to the United States National Museum. The 

 working out of the collection was unavoidably delayed, and mean- 

 while additional consignments were sent to me as they were received 

 at the National Museum, until a total of 292 bottles and tubes was 

 reached — one of the largest collections of Cumacea, if not the very 

 largest, that has ever been in the hands of a single investigator. 

 Even now the interest of the material is far from being exhausted, 

 for, to my regret, lack of time has prevented me from utilizing fully 

 the opportunities it offers for studying the variations of several of 

 the commoner species. 



ThiB examination of this collection has been carried out in the zoo- 

 logical department of the British Museum, and the results are pub- 

 lished here by permission of the trustees of that institution. The 

 authorities of the LTnited States National Museum have courteously 

 allowed a selection of duplicate specimens, including paratypes of 

 many of the new species, to be retained for the British Museum. 



The bulk of the material consists of specimens dredged by the 

 Albatross and other vessels of the United States Bureau of Fisheries 

 off the New England coast and in Alaskan waters, together with the 

 rich Alaskan collections of Dr. W. H. DaU. The remainder includes 

 specimens from other localities on the coasts of North and South 

 America and a few from Greenland and Japan. 



In all, 49 species liave been recognized, including 17 that appear to 

 be new to science, and one new genus has been established. A 

 small number of specimens have been set aside which may possibly 

 represent new species but do not afford adequate material for proper 

 description. 



The figures accompanying this paper have been drawn by Miss Ger- 

 trude M. Woodward. 



Proceedings U. S. National Museum, Vol. 41— No. 1876. 



603 



