FLOUNDERS FROM JAPAN. 



and Tanakius would be separated in the two primary subdivisions. 

 The close relationship of the two groups, however, is quite evident, 

 and is very well expressed by subgeneric distinction. 



Each of the two subgenera contains a single Japanese species, and 

 Dexistes, in correlation with its fewer vertebra? and associated charac- 

 ters, is the southern representative of Tanakius. 



Tanakius : named in honor of Dr. Shigeho Tanaka, a distinguished 

 Japanese zoologist. 



Hejcistes (TanaL'ius) Jiitaharae Jordan and Starks. 



Microstomas kitaharœ Jordan and Starks. Bull. U. S. Fish. 

 Comm., 22, 1902 (1904), p. 622, with plate; Proc. U.S. Nat. Mus., 

 31, iço6 (1907), p. 223; Hubbs, ibid., 48, 191 5, p. 490. 



Microstornus hireguro Tanaka, Zool. Mag., 28, 1916, p. 67 (not 

 seen); Fig. Desc. Fishes Jap., 25, 191 7, p. 447, pi. 122, fig. 351. 



Microstomas Jiircguro seems to be based upon a large individual 

 of Dexistes kitaharœ, specimens of which were dredged by the Albatross 

 near the type locality of the nominal species. 



The marked differences between this species and Microstornus 

 stellerà are really of generic value, and their relationship is quite 

 distant. In addition to these differences, the teeth in Dexistes are 

 more numerous, and occur on both sides of the jaws, whereas in 

 Microstornus they are fewer in number, and are nearly confined to the 

 blind side. 



Genus Microstornus Gottsche. 



Veraequa Jordan and Starks, Bull. U. S. Fish. Comm., 22, 1902 

 (1904), p. 628; Proc. U. S. Nat. Mus., 31, 1906 (1907), p. 210. 



Veraequa acJuie Jordan and Starks is so closely related to Micro- 

 stornus stelleri that the two species are now regarded as congeneric. 

 Microstomics achne differs from Microstornus stelleri in the narrower 



1) Ilubbs, I.e., p. 490. 



