﻿PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol.102 Washington: 1952 No. 3293 



SOME MARINE ASELLOTE ISOPODS FROM NORTHERN 

 CALIFORNIA, WITH DESCRIPTIONS OF NINE NEW 

 SPECIES 



By Robert J. Menzies 



In this report certain of the species of the isopod families Mun- 

 nidae and Janiridae from northern California are described. The 

 recorded species were all collected from the intertidal zones, with the 

 exception of laniropsis magnocula^ which was taken from about 30 

 fathoms off the California coast. Hitherto only the genus laniropsis^ 

 represented by two (really one) species, had been known from the 

 California coast. 



In order to eliminate repetition, those characteristics mentioned 

 in the family diagnoses are not mentioned in the generic diagnoses; 

 inrthermore, characteristics enumerated in the generic diagnoses ap- 

 ])Iy to the specific diagnoses and descriptions as well. 



In all instances, the width of specimens is taken at the widest part 

 of the second peraeonal somite; the length is measured on the mid- 

 line from the rostrum to the tip of the telson. 



Dr. Fenner A. Cliace, Jr., curator of the division of marine inver- 

 tebrates, United States National Museum; Dr. Melville Hatch, Zo- 

 ology Department, University of W^ashington; and Dr. Frank A. 

 Pitelka, Zoology Department, University of California, have all as- 

 sisted through the loan of certain specimens utilized in this report. 

 Dr. Cliace and Dr. Hatch kindly lent some type specimens, which 

 proved very helpful in clearing up the confused concept con- 

 cerning laniropsis kincaidi kincaidi. Most Monterey County speci- 

 mens were lent by Dr. Pitelka. They form part of a fine collection 



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