NO. 1263. JAPANESE TRACHINOW FISHES— JORDAN AND SNYDER. 483 
lO. TRICHODON (Steller). 
SAND FISHES. 
Trichodon Steller, in Tilesius, Mem. Acad. St. Petersburg, IV, 1811, p. 468 {tri- 
chodon). 
Trichodon Cuvier, Regne Animal, 2d ed., II, 1829, p. 140 {trichodon). 
Characters of the genus included above, the first dorsal long- and 
rather low, of 15 spines. One species. 
{OpiS, hair; oSovg, tooth.) 
17. TRICHODON TRICHODON (Tilesius). 
HATA-HATA' (FLAPPER) 
Trachinus trichodon Tilesius, Mem. Acad. St. Petersburg, IV, 1811, p. 473, pi. xv, 
fig. 88; Kamchatka. — Pallas, Zoographia Rosso-Asiatica, III, 1811, p. 235. 
J)rachi7ms trichodon Tilesius, Mem. Acad. St. Petersburg, IV, 1811, p. 406; name 
only. 
Trichodon stelleri Cuvier and Valenciennes, Hist. Nat. Poiss., Ill, p. 154, pi. lvii, 
1829; based on Trachiuus trichodon — GtJNTHER, Cat., II, 1860, p. 251 — Jordan 
and Gilbert, Synopsis, 1883, p. 627.— Ishikawa, Prel. Cat., 1897, p. 46; 
Hokkaido. 
Trichodon trichodon Jordan and Evermann, Fish. N. and M. Amer., III. 1898, 
p. 2295, fig. 806; Herendeen Bay, Monterey, Shumagin Islands. 
Trachinus gasteropelecus Tilesius, Mem Acad. St. Petersburg, IV, 1811, p. 466; 
Kamchatka. 
Trichodon Uneatus Ayers, Proc. Ac. Nat. Sci. Phila., 1860, p. 60; San Francisco; 
D. XV— 18; A. 28; P. 23. 
Head from tip of upper jaw, 3f ; depth 3^. D. XIII— I, 18; A. 28; 
P. 22; eye 4^ in head, snout 4i; maxillary 2; interorbital 3; pectoral 
1^; ventral If; height of spinous dorsal 3|. 
Body moderatelv elongate, compressed; dorsal outline slightlj^ con- 
cave and sloping gentl}" upward from snout to dorsal, thence turning 
at a very slight angle nearly straight to caudal; ventral outline well 
rounded from chin to caudal peduncle, the curve much more gradual 
posteriorh^; head and body everywhere covered with thin naked skin. 
Mouth large, superior, nearly vertical, the lower jaw projecting, its 
tips entering the profile; lips fringed; maxillary reaching to middle 
of pupil; teeth in 2 or 3 rows, small, sharp, and recurved; teeth on 
vomer; palatines toothless. Eyes placed high, their diameter equal to 
length of snout; interorbital wide and flat, a third wider than eye; 
top of head smooth, sometimes rugose in younger individuals, cov- 
ered with thin smooth skin; anterior nostril ending in a tube; preoper- 
cle with 5 spines, the one at angle largest, the 2 upper ones pointing- 
upward and backward, the middle one pointing downward and back- 
ward, the 2 lower ones pointing downward and forward; opercle with 
radiating ridges; gill rakers short and slender, numerous. 
Origin of spinous dorsal behind base of pectoral, its distance from 
>This name denotes the flapping of a bird's wings. 
