NO.1250. ATHERINE FISHES OF JAPAN— JORDAN AND STARKS. 205 
Second dorsal shorter than anal and similar to it. Caudal forked. 
Body with a wide black and silvery lateral band in strong- contrast to 
body color. 
{Iso Iwashi, surf -sardine: the Japanese name.) 
ISO FLOS-MARIS Jordan and Starks, new species. 
ISO-IWASHI (SHORE SARDINE); NAMI-NO-HAXA (FLOWER OF THE 
WAVE.) 
Atherinidx ? Genus ? Species Ishikawa, Prel. Cat., 1897, \). 3.3, Boshu, Hash- 
igo, Nos. 568, 569. 
Head of in body without caudal tin: depth 5. Eye 3 in head: maxil- 
lary 3; pectoral li; depth of head 1. Anal I, 23; dorsal lY— I, 16. 
Scales about 59; vertebra 18+26=43. 
Body strongh' compressed and deepest at pectorals. Dorsal profile 
obtuseh" rounded at snout, thence rather slightly and evenly rounded 
to second dorsal and becoming straight at the long caudal peduncle. 
Ventral profile with a sharp regular curve from tip of lower jaw to 
veutrals, thence almost straight to caudal. Bod}^ as viewed from before 
Fig. 4.— Iso fi.os-maris. 
over twice as deep as wide; the back rounded; the greatest width in 
the upper third or fourth; thence tapering wedgelike to the sharp 
breast. The anterior part of sides of body and head flat below the 
temporal region. 
Mouth small and very oblique; its angle about 45 degrees. The 
maxillary scarceh' reaches to the vertical from the anterior rim of the 
orbit while the angle of the lower jaw reaches very slightly past. 
Mandible triangular in shape, three-fourths as wide as long. When 
the mouth is closed the mandible closes tightly within the maxillaries 
and upper jaw leaving the latter slightl}^ projecting. 
Teeth very small on jaws, vomer, and palatines, those on the jaws 
in a very narrow band. Snout a little shorter than the diameter of 
eye. Interorbital space a little wider than eye. 
Gillrakers slender, about two-thirds the diameter of the eye in 
length; their number about 4+13. The first and second gill arches 
entirely free from each other as usual, but the second and third, and 
the third and fourth are separated oxAj by a short slit which is not 
longer than eye at about the angle; the fourth gill with only a tiny slit 
behind it. 
Head entirely scaleless. Scales with entire smooth edges; those on 
anterior part of bod}' variable; on some specimens the side is naked 
