376 
BULLETIN OF THE UNITED STATES FISH COMMISSION 
Genus 175. MICKOCANTHTJS Swainson. 
This genus differs from Chxtodon chiefly in the small scales, their being about 60 in the lateral 
line; the soft dorsal and anal are shorter than is usual in Chxtodon, the fin formula of the typical 
species being D. xi, 17; A. in, 14; it is in fact doubtful whether the genus contains a second species, 
as the other species with small scales have the soft tins many-rayed and constitute Bleeker’s genus 
Hemiiaurichthys (type, polylepis), which is apparently valid; in any case it has no close relation to 
Microcanthus strigatus. 
Microcanthus Swainson, Class. Anim., II, 215,1859 ( strigatus ). 
303. Microcanthus strigatus (Cuvier & Valenciennes). 
Head 3 in length; depth 1.75; eye 2.8 in head; snout 3.5; maxillary 4; interorbital 3.25; D. i, xi, 
16; A. in, 14; scales 10-50?-27. 
Body deep, rather short, compressed, back elevated; head father small, compressed, pointed, 
upper profile straight from tip of snout to eye, then slightly convex to dorsal fin; teeth sharp, pointed, 
pungent, in rather broad bands in jaws; jaws rather small, blunt, slightly produced; snout short, 
pointed; mouth small, terminal, small maxillary expanded distally to below anterior nostril; lips 
rather fleshy; eye large, anterior to middle of length of head, superior; nostrils close together, anterior 
with a small flap, posterior a short slit; interorbital space broad, flattened and slightly convex; pre¬ 
orbital broad, 2 in eye; dorsal spines longest anteriorly, fourth 1.75 in head, last 2.3; anterior dorsal 
rays longest, 1.9; second anal spine largest, enlarged, 1.8; anterior anal rays longest, second 2; caudal 
rather small, emarginate, about equal to head; caudal peduncle compressed, its depth 2.3; pectoral 
small, 3.8 in body; ventral 1.25 in head; ventral spine 2.25; scales rather weakly ctenoid, small; soft 
dorsal and anal covered with very small scales, caudal with small scales only at base; pectoral and 
ventrals with small scales basally; lateral line evenly arched to caudal peduncle, then straight to base 
of caudal. 
Color in alcohol, ground-color creamy white, side with 6 dark olive-brown nearly horizontal broad 
bands; first along middle of spinous dorsal across anterior rays, second along base of spinous dorsal 
across middle of soft dorsal, third below this along back and over posterior rays, fourth from occiput 
to middle of base of caudal, fifth from above eye across last third of anal, and sixth from snout, behind 
eye to base of pectoral then down to anal spine, running up along anterior soft rays; pectoral and caudal 
pale brown; ventrals pale brown basally, outer portions grayish. 
Described from an example taken by Jordan and Snyder at Honolulu, where the species is scarce. 
We have 4 specimens from Honolulu, 1 collected by Jordan and Snyder and 3 by Jenkins. Length 
3.3 to 4.3 inches. Other specimens were obtained by the Albatross at Honolulu. Compared with 
examples from Nagasaki we find no difference. 
Chxtodon strigatus Cuvier & Valenciennes, Hist. Nat, Poiss., VII, 25, pi. 170,1881, Japan; Gunther, Fische der Siidsee, II. 47, 
1874 (Sandwich Islands). 
Microcanthus strigatus, Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (Sept. 23,1903), 474 (Honolulu); Snyder, op. cit. (Jan. 
19, 1904), 532 (Honolulu). 
Genus 176. HENIOCHDS Cuvier & Valenciennes. 
Body much compressed and elevated; forehead in adult often with bony projections; dorsal spines 
11 to 13, the fourth greatly elevated and filiform; muzzle rather short; no teeth on palate; no spine on 
preopercle; scales moderate. 
Allied to Chsetodon, but well distinguished by the prolongation of the fourth dorsal spine. 
Hentiochus Cuvier A Valenciennes, Hist. Nat, Poiss., VII, 92, 1S31 (macrolepidotlis) . 
Taurichthys Cuvier <v Valenciennes, 1. e., 14G ( rarius). 
Diphreutes Cantor, Malayan Fishes, 159,1850 ( viacrolepidotus ); substitute for Hcnittchus, on account of Heniochc, a prior gen us 
of Lepidoptera. 
304. Heniocbus acuminatus (Linnseus). Plate LV. 
Head 3 in length; depth 1.5; eye 3 in head; snout 3.2; maxillary 5; interorbital 3.75; D. xii, 24: 
A. in, 18; scales 7-50-22. 
Body very deep, compressed, back very trenchant; head small, deep, upper profile undulate; snout 
pointed, rounded above; jaws produced, pointed, equal; mouth small, very oblique, maxillary small; 
