NO. 11244. GOBIOID FISHES OF JAPAN— JORDAN AND SNYDER. 
i I 
Tono-ue broad, notched anteriorly. Teeth minute, simple, in narrow 
Itands on both jaws; the outer ones but little enlarged. Gill openings 
large but not extending extremely far forward; the width of isthmus 
about equal to space between eyes. No papilla^ on shoulder girdle. 
Gill-rakers on first arch 2+8; short; rather slender. Anterior nostril 
Avith a short tube. No barbels on lower jaw. 
Head naked. Body with small cycloid or finely ctenoid scales, both 
kinds often occurring on the sides of the .same individual; scales on 
nape and breast minute; those on belh' small and easil}' displaced. 
Dorsals separate; the spines lower than the rays; when depressed 
the first dorsal does not reach insertion of second. Anal inserted 
below l)ase of third or fourth dorsal ray, extending when depressed 
a little farther posteriori}' than does the dorsal, both falling consider- 
ably .short of reaching base of caudal. Pectoral rather pointed, its 
upper edge without free filaments. Caudal rounded. Ventrals free 
posteriorly. 
Fig. 13.— Ch-kxugobius jiaceogxathos. 
Sides mottled with brownish or dusk}'; a lateral row of about V> 
indistinct large blotches present, the most posterior at ba.se of caudal 
fin; head with mottlings and reticulations of dark color. Spinous 
dorsal with a dark blotch on its posterior upper part; fin with a very 
narrow dark edge, below which is a light l)and anteriorly; other parts 
of fin dusky; .soft dor.sal dusky, with small white spots; caudal with 
dark broad zigzag vertical bands; anal dusky; the soft dorsal, caudal, 
and anal conspicuously Ixn'dered with white; pectorals light; ventrals 
dusky. 
Here described from a specimen collected near Tokyo by Professor 
Otaki. 
The species is of wide distribution, living in rivers, and is but little 
less abundant than Cttnogohius simllU. It is subject to considerable 
variation in shape of body, length of maxillary, and in color. Some 
specimens from Lake Biwahave the caudal peduncle narrower than have 
those from other localities. The length of the maxillary varies con- 
siderably with the sex, in the females l)eing much shorter than in the 
males. Some are very light in color, but the pattern as de.scribed is 
