PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 101 Washington: 1951 No. 3273 



NEW MARINE ISOPODS, CHIEFLY FROM NORTHERN 

 CALIFORNIA, WITH NOTES ON RELATED FORMS 



By Robert J. Menzies 



In this paper eight genera of marine Isopoda, including eleven 

 species and one named variety, are described from the coast of north- 

 ern California. Six of the genera are new to the fauna of the Pacific 

 coast of North America. One genus and nine species are believed to be 

 new to science. 



In treating the janirid isopods (those included by Hansen, 1916, 

 in his family Parasellidae) I have followed, primarily for convenience, 

 the classification given by Nordenstam, 1933. This does not mean, 

 however, that I advocate the use of that classification as a final one, for 

 it has too many serious draw^backs, many of which were expressed by 

 both Hansen and Nordenstam. At present I am not prepared to offer 

 a new classification, to revise the old ones, or to correlate the old with 

 the new, but I feel obligated to accept a reasonably recent classification 

 that presumably is the best for the time being. 



Acknowledgments are due Dr. Frank A. Pitelka, Zoology Depart- 

 ment, University of California, for the loan of a large collection of 

 marine isopods from Monterey, Calif., made by John Davis; Dr. Mel- 

 ville H. Hatch, Zoology Department, University of Washington, for 

 the loan of many specimens, particularly types of species described by 

 him ; and Dr. John Mohr, Zoology Department, University of South- 

 ern California, for checking certain references not available to me. 

 Particular thanks are due Dr. Fenner A. Chace, Jr., curator of marine 

 invertebrates, U. S. National Museum, for his many helpful sugges- 

 tions and worth-while criticisms, the loan of important material, the 

 examination of type specimens, and his generous cooperation. 



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