12 PROCEEDINGS OF THE NATIONAL MUSEUM. voi-.xxiv. 
Rings IS + 45 to 55. D. 40 to 45; P. 17 to 23. Head 2 in trunk; 
tail .shorter than trunk. A more or k'ss distinct space on upper 
margin of orbit. A blunt prominence on occiput. Origin of dorsal 
nearly opposite vent, its base covering ten rings; usually a small 
barbel on mandilile; adult sometimes with minute filaments along 
lower side of head, body, and tail. (Gimther.) 
Color pale green or brown, orange below, a pale spot edged with 
vermilion on each body-ring; lower side of head with dark markings. 
(Day.) 
East Indies, common, rarely north to Japan; one specimen taken at 
Shimoda l).y Commodore Perry's expedition; a specimen from Miyako- 
shima in the Imperial Museum of Tokyo; none taken by us. {hi.s, two; 
((culea, spine.) 
lO. ACENTRONURA Kaup. 
Arrntrovnra Kaup, Lophobranchiates, 1856, p. IS {f/rnrilissima) . 
Small slender sea-horses, without coronet. Trunk slightly' com- 
pressed; tail prehensile and finless. Occiput compressed into a crest, 
without coronet. Shields without spines. Pectoral tins present. 
Edge of trunk continuous with that of tail. Egg pouch as in lUppo- 
camp\(i<^ at base of tail.- 
[a — , without; Kivrpov^ spine; ovpa, tail.) 
II. ACENTRONURA GRACILISSIMA (Schlegel). 
Hippocampus granlisftrmiiK Schlegel, Fauna Japonica, Poiss., p. 274, pi. cxx, fig. 6, 
Nagasaki. 
Acentronura graclUiwa Katp, Lophobr., 1856, p. 18, Nagasaki (rings 42 to 45). — 
GiJNTHER, Cat. Fish., VIII, 1870, p. 198, after Schlegel.— Dcmekil, Hist. Nat. 
Poiss. II, 1870, p. 527, after Schlegel.—? Day,' Fish. India, p. 681, pi. clxxvi, 
fig. 1; ? Fish. Brit. India, II, p. 467, Andamans.— Nystkom, Handl. Svensk. 
Vet. Akad., 1887, p. 47, Nagasaki. 
Head If in trunk; head and trunk 1^ in tail; rings 13 + 45 or 46 
(41 to 45, Day). D. 16; P. 12; A. 3. Snout 21 in head; eye li in 
snout; 2 in postorbital part of head. Egg pouch on 13 plates; dorsal 
on 4 rings; two on tail; its base with a prominent elevation. Dorsal 
ridges of body continuous with those of tail. Suborbital ridges very 
prominent, joining above the snout to form a triangular crest, then 
spreading out to form a triangular figure above snout. Occiput 
divided by a depression; body slightly thicker than head. 
Color iirownish, with small pale dots and dark markings; dorsal with 
groups of small blackish dots, forming a dark cross) )and. 
Coast of Japan, rare; one fine male specimen 62 millimeters long 
obtained off Misaki in the Kuro Shi wo {gracilimus, very slender). 
'The two specimens from the Andamans dredged by Mr. J. Wood-Mason : re 
described by Dr. Daj' as having 13 -|- 41 to 45 rings. 
