NO. 1244. GOBIOID FISHES OF JAPAN— JORDAN AND SNYDER. 
117 
Measurements of Tridentiger hucco. 
Length in raillimeter.s 
Deptli e.xprci<sed in hundredths of 
length a 
Depth of eaudul peduncle 
Length of head 
Length of snout 
Widtli of interorbital space 
Diameter of orbit 
Distance from .-^nout to spinous dor.«al 
Distance from snout to soft dor.sal ... 
Heiglit of longest dorsal spines 
Height <if longest dorsal rays 
Distance from snout to anal tin 
Height of longest anal rays 
Length of caudal pe<luucle 
Length of caudal fin 
Length of pectoral fin 
Length of ventral fin 
Number of dorsal spines 
Number of dorsal rays 
Number of anal rays 
Number of pectoral rays 
Number of scales in lateral series 
Number of scales in transverse series 
78 
74 
75 
69 
67 
67 
72 
70 
70 
18 
18 
17 
19 
20 
20 
20 
19 
19 
14 
14 
14 
14 
14 
15 
14 
14 
14 
29 
29 
29 
30 
29 
30 
30 
30 
30 
8 
8 
7^ 
8 
8 
7i 
84 
8 
8 
6i 
7 
65 
6 
7 
6i 
7 
7 
7 
4i 
4 
4 
4 
4 
4i 
14 
4 
4 
37 
37 
36i 
39 
40 
39 
39 
38 
38 
57 
57 
56i 
58 
57 
59 
59 
57 
58 
15 
15 
14 
16 
16 
18 
16 
11 
114 
17 
15 
144 
16 
15 
15 
17 
14 
144 
63 
60 
61 
62 
63 
63 
624 
65 
62 
15 
14 
15 
15 
13 
154 
15 
13 
14 
25 
23 
22 
2U 
22i 
234 
244 
23 
23 
22 
22 
22 
24 
21 
22 
22 
22 
22 
22 
26 
24 
24 
23 
25 
24 
24 
24 
16 
17 
m 
16i 
17 
17 
18 
17 
164 
6 
6 
6 
6 
6 
6 
6 
6 
6 
13 
13 
13 
13 
13 
13 
13 
13 
13 
11 
11 
11 
11 
11 
11 
11 
11 
11 
19 
19 
19 
19 
19 
19 
20 
19 
20 
48 
53 
48 
48 
49 
48 
50 
49 
52 
15 
15 
15 
15 
16 
16 
17 
17 
17 
aThe measurements of tlie dei)th in this case are only approximate, the abdomen having shrunken 
in preservation. 
50. TRIDENTIGER BIFASCIATUS Steindachner. 
SniMAHAZE (STRIPED GOBY). 
Tridcnti//tr hl/asciatm Steindachner, lehth. Beitr., X, p. 12 (190), Bay of Strielok, 
Japan Sea, near Vladivostock. Coll. Professor Dybowski, based on adult 
specimens without black caudal spot. 
IVifissKS iotarus^ Jordan and Snyder, Proc. IT. S. Nat. Mus., XXIII, 1900, p. 873, 
Bay of Tokyo. Coll. K. Kishinouye; type No. 49403 U. S. Nat. Mus. ; (;o-type 
No. 6270, L. S. Jr. Mus. ; based on young specimens. 
Head 3i; depth 5; D. VI-13; A. 11; P. 19; .scales 54-16. Eye 7i 
in head (less in young specimens); interorbital space 3^ (the bony 
^ The followuag is the description of Japanese specimens ( T. ioturusi) , which we are 
unable to separate from T. bifasciaUis, except by characters siil)ject to change with 
age: 
TRIFISSUS lOTURUS Jordan and Snyder. 
Descrijjiion — Head 3*111 length; dei3th4^; depth of caudal peduncle 6i; eye 4 in 
head; snout 4|; interorbital space, bony ridge, 7 to 8 (fleshy jiart 3} to 4); height 
of longest dorsal s^nne, 7 in length, ray 7; longest anal ray 72; length of jiectorals 3^; 
ventrals 4j; caudal 45; dorsal VI-13; anal 12; scales in lateral series 54, in trans- 
verse series 16, between origin of soft dorsal and anal. 
Head wide and flat, its width contained li times in its length; interorbital 
space convex. Snout blunt. Mouth slightly oblique; jaws equal; premaxillary 
extending to a vertical through anterior edge of pupil; lips thick. Upper jaw with 
a row of 18 long, flat, trilobed, movable teeth, behind which is a row of small, 
sharp, simple teeth; lower jaw with 20 trilobed teeth, followed by a narrow band of 
simple, sharj), curved ones; each side of lower jaw with a small, curved canine 
scarcely larger than the other teeth. Gill-rakers short, pointed. Body covered 
with small, ctenoid scales, large posteriorly, smaller anteriorly, extending forward 
on nape and top of head to within a short distance — about the diameter of pupil — 
of the edge of orbits; other parts of head naked; without barbels. Dorsal fins not 
connected; third spine longest; others gradually shorter; rays, except first and last, 
of about the same length. First ray of anal short, simple; others gradually longer. 
Soft dorsal and anal projecting an equal distance posteriorly. Caudal rounded. 
