142 
Fishery Bulletin 113(2) 
Table 6 
Counts of dorsal-fin rays, anal-fin rays, anterior anal-fin pterygiophores, pectoral-fin rays, pigmented pectoral-fin rays, and 
caudal-fin rays in species of Ammodytes of the North Pacific region. Pigmented pectoral-fin rays are reported only for speci- 
mens larger than 100 mm in standard length. 
Dorsal-fin rays 
50 
51 
52 
53 
54 
55 
56 
57 
58 
59 
60 
61 
62 
63 64 65 66 
n 
A hexapterus 
9 
20 
28 
26 
15 
10 
2 
2 
113 
A. personatus 
4 
19 
41 
39 
56 
50 
40 
18 
17 8 1 
293 
A. japonicus 
1 
5 
4 
6 
12 
21 
20 
12 
7 
5 
2 
95 
A. heian n. sp. 
2 
2 
3 
6 
8 
2 
23 
Anal-fin rays 
25 
26 
27 
28 
29 
30 
31 
32 
33 
n 
A hexapterus 
2 
18 
22 
49 
26 
10 
2 
130 
A. personatus 
1 
1 
15 
44 
65 
106 
40 
19 
2 
292 
A. japonicus 
1 
2 
14 
37 
24 
8 
3 
1 
90 
A. heian n. sp. 
3 
7 
5 
8 
23 
Anterior anal-fin pterygiophores 
7 
8 
9 
10 
11 
12 
13 
14 
n 
A hexapterus 
1 
8 
39 
26 
25 
13 
9 
4 
126 
A. personatus 
4 
23 
61 
96 
75 
27 
5 
291 
A. japonicus 
1 
6 
24 
36 
12 
4 
83 
A. heian n. sp. 
2 
7 
11 
3 
23 
Pectoral-fin rays 
13 
14 
15 
16 
17 
n 
A hexapterus 
6 
47 
48 
1 
103 
A. personatus 
37 
135 
54 
7 
233 
A. japonicus 
6 
50 
32 
2 
1 
91 
A. heian n. sp. 
7 
11 
4 
1 
23 
Pigmented pectoral-fin rays 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
n 
A hexapterus 
3 
14 
25 
18 
3 
63 
A. personatus 
19 
20 
28 
12 
5 
84 
A. japonicus 
3 
10 
14 
15 
14 
6 
1 
63 
A. heian n. sp. 
1 
5 
6 
4 
3 
1 
20 
Principal caudal-fin rays 
13 
14 
15 
16 
17 
18 
n 
A hexapterus 
1 
99 
19 
2 
122 
A. personatus 
1 
2 
240 
26 
8 
1 
278 
A. japonicus 
2 
73 
13 
5 
1 
94 
A. heian n. sp. 
19 
2 
2 
23 
Diagnosis 
A species of Ammodytes distinguished from A. japoni- 
cus by significantly more total vertebrae (65-72 vs. 59- 
66) and precaudal vertebrae (40-47 vs. 36-43), fewer 
pored lateral-line scales (121-152 vs. 132-163) and 
dermal plicae (143-172 vs. 144-182), more dorsal-fin 
rays (56-63 vs. 50-60), and fewer pigmented pectoral- 
fin rays (2-6 vs. 4-11). It is further distinguished from 
the new species by its significantly larger orbit (12- 
