NO. 124-1. GOBIOID FISHES OF JAPAN— JORDAN AND SNYDER. 
125 
Measurements of Ludogobius guttatus. 
Length in mil]iiTieters 
Depth expressed in hundredths of length ... 
Depth of caudal peduncle 
Length of liead 
Lengtli of snout 
Width of interorbital space a 
Diameter of orbit 
Distance from snout to dorsal 
Height of longest dorsal rays 
Distance from snout to anal 
Height of longest anal rays 
Length of caudal peduncle 
Length of caudal tin 
Length of pectoral fin 
Length of ventral tin 
Number of dorsal rays 
Number of anal rays 
Number of pectoral rays 
47 
51 
46 
51 
15 
14i 
14i 
15i 
9i 
9 
Hi 
9i 
24 
09 
25 
24 
6 
5 
6 
6 
6 
6 
7 
7 
3 
3i 
3i 
u 
65 
65 
66 
66 
5 
5 
5i 
Si 
65 
65 
66i 
65 
5 
4^ 
05 
6i 
18 
19 
18 
17i 
14i 
14 
14 
15 
15 
14 
14* 
14 
5 
5 
6 
5 
12 
12 
12 
12 
12 
12 
12 
17 
16 
17 
16 
a Distance between eyes. 
31. LEIJCOPSARION Hilgendorf. 
Leucopsarion Hilgendorf, Berliner Monatsber., 1880, p. 339 {petcrsi) . 
Body elongate, compressed, scaleless, the substance translucent; head 
short, depressed above; the cheeks little tumid; the eyes prominent; 
mouth rather large, terminal, oblique; teeth simple, no barbels; tongue 
notched; isthmus narrow, the gill openings continued forward below. 
Spinous dorsal wanting; soft dorsal moderate, well separated from the 
short caudal; anal longer than the soft dorsal and inserted well in 
advance of the latter; pectorals rather long; ventrals very small, fully 
united, forming a rounded scale-shaped disk, the rays obscure; the 
structure seems exactly as in Gohius, but the tin much less developed. 
Small translucent fishes of the estuaries of Japan, evidentl}^ closely 
allied to Luciogohkis and related to the true gobies. One species 
known. 
(A.fL'/cocr, white; oi/^dpiov, a little fish.) 
55. LEUCOPSARION PETERSI Hilgendorf. 
SHIRO-UWO (WHITE FISH): HIO. 
Leucopsarion peterd Hilgendorf, Berliner Monatsber., 1880, j). 340, April 5, 
Southern Japan. 
Head 5i in length; depth 7i; depth of caudal peduncle 12f ; eye 4: 
in head; snout 3^; maxillary 2i; D. 18; A. 17; P. 15. 
lk)dy long, slender, considerably compres.sed; caudal peduncle nota- 
bly long. Head long, not so deep or l)road as body; snout rather 
blunt, the lower jaw projecting. Eyes small, directed laterally; inter- 
orbital space convex, the distance between eyes equal to leng-th of 
snout. ^louth oblique; maxillary extending to a point below middle 
of pupil. Teeth simple, long, slightly curved backward, in a single 
row on each jaw; no canines. Gill opening l)road, extending very far 
forward; the isthmus narrow. No papillte on inner edge of shoulder 
girdle. Gill-rakers long and slender. No barbels on head. 
