BULLETIN OF THE BUREAU OF FISHERIES. 
136 
Leptocypris Boulenger. Proc. Biol. Soc. Wash., xxin, p. 144. 
Leuciscus Cuvier, dace, chub, etc. Proc. Biol. Soc. Wash., xxn, p. 215-216 (including not only Leuciscus 
proper, but also Rutilus Rafinesque, Pigus Bonaparte, Cephalus Bonaparte, Idus Heckel, and Scar - 
dinius Bonaparte); Zool. Anzeiger, xxxvi, p. 479-480; Biol. Bulletin, xx, p. 371, pi. 1, fig. 7 ( L . 
illyricus), pi. 11, fig. 10 (L. rutilus), fig. 11 ( L.friesii ), fig. 12 (L. hakuensis), fig. 13 (L. jouyi). 
Leucogobio Gunther. I have L. mayedce (Jordan & Snyder) from Lake Biwa, Japan (Jordan & Snyder). 
The scales are much broader than long (length about 3X mm., breadth 5^3), but otherwise entirely 
of the type seen in Gobio, with the same radii, circuli, etc. 
Luciosoma Bleeker. I have three species from the British Museum. The scales are large and sub¬ 
quadrate; basal, lateral, and apical radii distinct, the lateral oblique, not or hardly at all directed 
toward the nucleus, except when the lower end is abruptly bent and turned inward; circuli very 
fine, but absent in the granular or striate apical field; laterobasal corners distinct. The species are 
separated thus: 
Nucleus central or nearly; scale 13 mm. long and 10 broad; about 10 apical radii; fish with dorsal 
fin very far back (W. Siam, Carl Bock). L. harmandi 
Nucleus conspicuously basad of middle. 1 
1. Scale reddish, n mm. long, io% broad; about 14 apical radii; fish with dorsal far back (Kapit, 
Rejang district, Sarawak, C. Hose). L. pellegrini Popta 
Scale white, 8 mm. long and 7 broad; about 14 apical radii; fish with row of large spots down 
side (Upper Baram River, C. Hose). L. trinema 
In scale characters the genus is very compact and except for the difference in the position of the 
nucleus the characters cited may not be specific. Scales of L. trinema are figured on plate 
xxxni, figure 7. 
There is a rather strong resemblance between the scales of Luciosoma and Leptobarbus hoevenii, but 
in Luciosoma the apical radii are spreading, fanlike, in the Leptobarbus they are parallel. 
Macrochirichthys; see Chela macrochir; Proc. Biol. Soc. Wash., xxm, p. 142. Fowler (1905) treats Macro- 
chirichthys as a distinct genus. 
Myloleucus Gunther. Cope published a genus of the same name at about the same time, but I believe 
the American genus has priority. 0 M. cethiops, from Kiu-Kiang (Styan; B. M.), has large scales, 
approximately circular, but with more or less evident laterobasal angles; length 12, breadth n mm.; 
nucleus central; area covered by skin unusually large, extending to nucleus, skin densely speckled 
with red-brown pigment; basal circuli quite dense; slight basal folds, but no radii; apical radii about 
a dozen, feeble; apical circuli strong, longitudinal, converging toward the middle, where they meet 
at very acute angles. A scale approaching the type of Cirrhina jullieni. 
Neobola Vinciguerra; see Engraulicypris. 
Opsariichthys Bleeker. Zool. Anzeiger, xxxvi, p. 252, fig. 1 (O. morrisonii ); xxxviii, p. 87. The species 
figured is now to be referred to Zacco. 
Oreinus McClelland. (PI. xxxiv, fig. 16.) A genus of mountain fishes with small scales, circular or 
broad-oval or ( grahami) sometimes sub trigonal, with nucleus central or nearly, circuli not very dense 
and rather widely spaced radii all around. They are therefore of the general type of Chrosomus and 
Phoxinus. The genus on scale characters is quite compact. Three species have been examined in 
the British Museum: 
O. grahami. Tongchuenfu, Yunnan (J. Graham). Scales 2 to 2% mm. diameter. 
O. plagiostomus (Heckel) Assam (F. Day). Scales about 1 by mm. 
O. richardsonii (Gray & Hardwicke) Nepal (B. H. Hodgson). Scales a little smaller than those of 
O. grahami. This genus is referred to the Schizothoracinae. 
Osteobrama Heckel. Day calls this genus Rohtee. Dr. G. A. Boulenger writes (litt., May, 1910): “ Rohtee 
Sykes and Osteobrama Heck, are synonyms. Both genera were established in the same year. I don’t 
know which has really priority.” I have four species from the British Museum. 
0 Dr. D. S. Jordan kindly informs me that Cope’s name has about a year’s priority. Myloleucus Gunther may be changed 
to Myloleucops n. n., our fish becoming Myloleucops aethiops. 
