PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued kfc|^^vA. vJ^lyl l>y tfie 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 106 Washington : 1956 No. 3372 



OBSERVATIONS ON THE AMPHIPOD GENUS PARHYALE 



By Clarence R. Shoemaker 



The genus Parhyale was created by T. R. R. Stebbing in 1897 for 

 an amphipod taken at St. Thomas, Vh'gin Islands, because it differed 

 from Hyale by the possession of a minute inner ramus to the third 

 uropod, a character which had not been noted in any member of the 

 Talitridae. This inner ramus having been overlooked by all students 

 of the Amphipoda, the species of Parhyale had been assigned to Hyale 

 or Allorchestes. Stebbing described and figured the species Parhyale 

 fasciyer (later changing the name to fascigera) from St. Thomas, 

 Virgin Islands. In 1853 James D. Dana described a species Allor- 

 chestes hawaiensis from Maui, Hawaiian Islands, and figured it in 

 1855. He did not, however, describe or figure the small inner ramus 

 to the third uropod which this species possesses. Stebbing (1906, 

 p. 573) transferred Dana's species to Hyale, but gave it doubtful 

 specific status. Dr. A. Schellenbcrg (1938, p. 66) correctly identified 

 specimens of this species from Hawaii, but continued to place the 

 species in Hyale. 



Parhyale kurilensis was described by Masao Iwasa (1934, p. 1) 

 from specunens taken in the Kurile Islands. A. N. Derjavin (1937, 

 p. 106) made Iwasa's species a synonym of Brandt's species Allor- 

 chestes ocholensis, which was made the genotype of a new genus 

 Parallorchestes by Shoemaker (1941, p. 183). Derjavin at the same 

 time transferred Brandt's species to Parhyale, making it Parhyale 



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