NO. 1244. GOBIOID FISHES OF JAPAN— JORDAN AND SNYDER. 113 
separate, the cheeks tumid, scaleless; mouth moderate, oblique, the 
lower jaw rather prominent; teeth rather large, fixed, in about 2 
rows, those in the outer row trifid, the middle cusp the longer; inner 
series of sjualler, pointed teeth; tongue rounded at tip; no barbels; 
gill openings restricted to the side, the gill openings very broad. 
Dorsals short, the first of slender spines, the second of 10 to 12 
rays; caudal rounded; pectoral rounded, some of the upper rays 
short, none of them silky. Ventrals rather long, formed as in Gohius, 
not adnate to the belly. 
Rivers of China and Japan. Robust species, allied to Oteiiogohius, 
but with the teeth trifid. We follow Steindachner in identifying 
Trkenophork'hthy)^ with Trldentiger. Trijissus is also unworthy of 
separation. This genus has no especial afiinity to Sicydmm. 
{Tres, three; de7is^ tooth; (/i-ro, bear.) 
Tridentiyer. 
a Body olive green, witli faint cross l)an<ls but no lengthwise stripes; scales less 
than 50. 
h. Scales 34-18; D. YI-12; head '.)\ in length; depth 42; cheeks moderately 
tumid; head with pale spots; i)ectoral with a dark spot and pale bar at 
base ohscarm. 48. 
hh. Scales 48-15; D. YI-13; head 3| in length; depth 6^; cheeks excessively 
swollen ; head with pale spots ; a pale band on pectoral at base . . buccu. 49. 
Tnfissiis. 
aa. Body olive green, with 2 black lengthwise bands; I). VI-13; scales 54-16; head 
Sj in length ; Iwdy 4 J ; cheeks little tumid bifasckihis. 50. 
48. TRIDENTIGER OBSCURUS 1 Schlegel). 
Sicydium ohxcnrtDii Schlegel, Fauna Japonica, Poiss., 1847, }>. 145, pi. lxxvi, fig. 1, 
Nagasaki. 
Tridentiyer ohscurus Gill, Ann. Lye. Nat. Hist. N. Y., 1858, Shimoda. — GtJNTHER, 
Cat. Fish., Ill, 1861, p. 566; after Schlegel. — Steindachner, Ichth. Beitr., 
YIII, 1879, p. 29. 
Tri;fnop]i()rie}il)n/s squa)ui^:triyatiis Hilgendorf, Sitzber. Naturf. Freunde, 1879, 
III, Tokyo; No. 10647, :Mus. Berl.— Jordan and Snyder, Proc. V. S. Nat. Mns., 
1900, p. 372, Yokohama; Coll. Otaki. 
Tridentiyer squamistriyatiis Steindachner, Ichth. P>eitr., YIII, 1879, p. 3], Japan. 
Head 8^ in length; depth -Ij; depth of caudal peduncle 2i in head; 
eye oi; snout 3i; D. VI-12; A. 11; P. 20; scales in lateral series 34, 
in transverse series 16. 
Head large and l)road, the cheek muscles not so greatly developed 
as in T. hurro. Snout l)lunt; the jaws equal; mouth oI)li(|ue. Maxil- 
lary reaching a vertical passing between pupil and anterior edge of 
orbit. Teeth in 2 series, those of the outer series in 2 closely apposed 
rows, the teeth alternating in position, flat, trilobed, except 2 or 3 
posterior ones on each side of jaw; teeth of inner row small, simple, 
curved backward. Tongue broad, rounded anteriorly. Gill opening 
not extending far foi'ward; the isthnms lirojid, its width equal to dis- 
tance from pupil to tip of snout. Inner edg(> of shoulder girdle with 
Proc- N. M. vol. xxiv— 01 8 
