No.iJii. CERTAIN FISHES OF JAPAN— JORDAN AND SNYDER. 17 
mottled; a dark bar at })ase of snout. Dorsal usually dusky with a 
pale inodian band. A speeinien from Hakodate is leather brown, 
with dark markings on head; middle line of breast black; tail dark. 
A specimen from Onomichi is nearly uniform livid gray. One from 
Hakodate has almost no coronet. 
The combination of low, keel-like coronet with the short snout and 
16 dorsal rays at once distinguishes the species. Our numerous 
specimens are from Hakodate, Matsushima, Tokyo, Onomichi, and 
Wakanoura. The range of the species is farther to the northward 
than the others. 
17. HIPPOCAMPUS SINDONIS Jordan and Snyder, new species. 
(riateXI.) 
Head lii in trunk; trunk 2 in tail. D. 15; P. 14. Rings 10 + ;37. 
Snout short, its length 2| times in head. Eye If times in snout. 
Depth of trunk 1^ times snout. Coronet high, almost as high as the 
length of snout. It is laterally compressed up to its middle, ends 
anteriorly in an acute triangular spine with a hlament, also terminates 
posteriorly in an acute spine, without tilament. From the middle up 
it is longitudinally compressed, giving rise to a laterally expanded, 
fan-like process, with live spines, pointing upward; the one next to 
each end with a filament. Supraorbital spines very prominent, with 
filaments and a distinct minor spine in the immediate front of each, all 
pointing anteriorly, large ones slightly outward as well; a well-marked 
spine on median line before eyes. Tubercles on body rather high, 
those in first, fourth, seventh, and tenth body rings, and second, 
fourth, sixth, eighth, tenth, and thirteenth tail rings enlarged and 
with filaments. The raised dorsal fin on li + i rings. Pectorals very 
nuich developed. 
Color greenish gray, with irregular darker markings on ])od3' and 
tail. Head mottled with dark gra}^ on greenish ground, interspersed 
with light cross bars and streaks. Middle line of belly black. Fins 
dusky, unmarked except the dorsal, which has a dark band longi- 
tudinally. Egg pouch occupies seven rings, greenish and covered 
with prickle-like processes. 
This species is known from one small specimen, an adult male 38 
millimeters long, type No. 47930 U. S. National Museum, dredged by 
the U. S. Fish Commission steamer Albatross in Totomi Bay, ofi' 
Hamamatsu, in the province of Totomi, Japan. The species is allied 
to II. niohnikei, but differs in the form of coronet, the number of fin 
rays, and slimness of body, and also its size, which is much smaller 
than the smallest specimen of inoJinikci. 
(Named for Michitaro Sindo, late of Yamaguchi, assistant curator 
of fishes in Stanford Universit3^) 
Proc. N. M. vol. xxiv— 01 2 
