248 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.Length of liead 4.|-4| times in the total length.?Greatest depth of bodyfrom a little more than ten to a little less than eleven times.?No lateralline."M. B.6; D. 90; A. 70; P. 18.As will be thus seen, the two fishes are certainly congeneric, and areevidently very closely related. Even the slight discrepancies are appar-ently such (as in the case of the color) as result from difference of inter-I^retation of the same characters. The vertical fins in the Californianform, however, are distinctly said to be "margined with black," whilein the Japanese form it is at least implied that they are not. It is quiteprobable, nevertheless, that even these alleged differences may be foundto be rather of degree than of kind. In view, however, of the differenceof tftstribution, it is reasonable to suppose that the two forms will befound to be distinct, and, as the genus appears to be perfectly valid, theywill rank as species, with the following names : 1. Lycodopsis pacificus.Lycodcs pacificus Collett, Proc. Zool. Soc. Loudon, 1879, p. 381,Hob.?Japan.2. Lycodopsis paucidens.Leurynnis paiicidius Lockiugton, Proc. U. S. Nat. Mus. 1879, p. 32(3.Hob.?California.DESCRIPTION OF A IVE^V CHIROIW FISH, iriYKIOU.EPIS ZOIVIFER,FR?.ri MOIVXEREY' BAY, CAtilFORIVIA.By M?. N. LOCKirVGTOM.Myriolepis, gen. nov. (Ckirid