58 
PROCEEDINGS OF THE NATIONAL MUSEUM. 
in some iiidividiuils. The tins ai'(> dark, havino- small ln'own spots 
arranoed in lines. The oceiput has a few small brown spots. 
Several hundred specimens collected i)v iis in Lake Biwa, at Matsu- 
bara, are light colored, with five or six large, dark, lateral spots. The 
dorsal, anal, and caudal fins have light borders. The white edgings of 
the dorsal are especially conspicuous in the larger specimens. 
Fresh waters of Japan, from above Tokyo southward, everywhere 
very common; excessively abundant in Lake Biwa. It is one of the 
smallest gobies, being mature at 2 to 4 inches. Our specimens are 
from Ishikawa-ken, Lake Biwa, Tsushima, Nagasaki, Kurume, Kaga, 
Kana R. , Kawatana, and lyo. 
{Si mill K^ similar to Ctmogohiui^ i>i1'<iniiii.) 
Measurements of (tenogohiiis sImUls. 
Length in millimeters 
Depth cxiirvssed in hundredths of length 
Depth dl' ciUKliil peduncle 
LenKth of head , 
Lenifth of snout , 
Width of iiitiTorbital space 
Diameter of orbit 
Distance from snout to spinous dorsal 
Distance from snout to soft dorsal , 
Height of longest dorsal spines , 
Hcif^ht (if l(ini,'cst dorsal rays , 
Distance from snout to anal fin 
HciKhtof longest anal rays , 
TjCUKth of caudal ])cduncie , 
Lcii,t;th of caudal tin , 
LeiiKth of jiccloral tin 
Len,i;th of \ciitral tin , 
Nuiiil_icr of dorsal spines , 
Number of dorsal rays , 
Number of anal rays , 
Ninnber of pectoral rays 
Number of scales in lateral series 
Number of scales in transverse series. 
Locality, Tsusehima. 
75 
78 
69 
70 
69 
66 
60 
60 
54 
60 
18 
17 
21 
20 
19 
20 
20 
18 
18 
19 
14 
13 
14 
14 
14 
14 
13 
13 
13 
13 
;« 
31 
34 
32i 
31 
32 
28 
28 
28 
29 
15 
13 
16 
14 
13 
14 
12 
10 
11 
11 
2i 
2i 
2A 
2 
2 
2^ 
9 
2 
'> 
2i 
5i 
6 
6 
5 
6 
6 
( 
6 
61 
6 
42 
41 
44 
43 
43 
42i 
40 
39 
40 
42 
61 
m 
62 
62 
6U 
63 
62 
61 
(il 
62^: 
2S 
29 
27 
30 
24 
28 
15 
14 
16 
18 
25 
20 
25 
24 
21 
20 
15 
16 
15 
17^ 
()5 
U 
66 
66 
65 
66 
06 
66 
65 
(i5 
17 
15 
16 
17 
15 
15 
15 
IH 
14 
15 
24 
24A 
24 
23 
24 
24i 
25 
23 
24 
24 
20 
2() 
2(5 
26 
25 
26 
24 
25 
24 
26 
25 
23 
24 
24 
23 
23 
2() 
25 
24 
26 
12 
11 
13 
13 
12 
12 
12 
12 
12 
12 
(5 
(> 
fi 
6 
6 
(i 
6 
6 
li 
6 
9 
10 
9 
9 
9 
9 
9 
9 
9 
9 
9 
10 
9 
9 
9 
9 
9 
9 
9 
9 
19 
19 
19 
19 
19 
19 
20 
19 
19 
20 
31 
31 
30 
31 
29 
29 
28 
32 
31 
33 
11 
11 
11 
11 
10 
11 
10 
11 
10 
10 
13. CTENOGOBIUS GYMNAUCHEN (Bleeker). 
. Gobius gijmnaiichen- Bleeker, Act. Soc. Sci. Indo-Nederl., Japan, VI, p. 84, pi. i, 
fig. 2, Tokyo.— GtiNTiTER, Cat. Fish., Ill, 1861, p. 43 (after Bleeker). 
Arentrogobius gymniiucJien Jordan and Snyder, Proc. U. 8. Nat. Mus., 1900, p. 
.372, Tokyo. 
Head 3| in length; depth 6; depth of caudal peduncle 2| in head; 
eye 4i; snout U; maxillary 3^; D. VI-10; A. 10; P., 16; scales in 
lateral series 26, in transverse series 7. 
Bod}' elongate; head about as deep as body, somewhat broader; 
eyes rather large, high up, directed laterall}^ or somewhat obliquely; 
interorbital space narrow, slightly convex. Snout rather sharp, its 
upper outline more oblique than that of C. 'pflaumi. Lower jaw 
slightly projecting. Mouth oblique. Maxillary concealed throughout, 
extending to a vertical through anterior edge of pupil. Teeth simple, 
in narrow bands on both jaws, outer row enlarged, the most posterior 
large tooth on each side of lower jaw strongly curved backAvard. Gill 
opening not extending far forward; isthmus broad, its width about 
