348 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 15 
Head 4.1 in length to base of caudal; depth 9.2; depth caudal peduncle 4.5 
in head; depth head 2.6; length snout 2.5; diameter eye 4; width interorbital 
space 3.7; length pectoral fin 1.3; ventral fin 2.2; height dorsal 2.1; anal 2.4; 
length caudal 1.8; scales lateral series to base of caudal 166; vertical series 
between lateral line and middle of back 22; pectoral rays 11; dorsal 9; ventral 
9; anal 7. 
Length of barbel equal to diameter of pupil, extending when depressed 
over half way between its base and border of lower lip. Upper lip with many 
rows of tubercles, the edge fringed with papillae. Lower lip covered with 
small tubercles and with pendent lobes which extend posteriorly. 
Gillrakers long and slender 17 plus 19 on the first arch. 
Head and body almost completely scaled, the scales extending over throat 
to edge of lip, under part of snout, and along the rays of all the fins. Tip of 
snout, lips, and opercular membrane naked. The scales are long and slender 
with 9 spines on the exposed ends. 
Pectoral and ventral fins with pointed axillary flaps over half as long as 
the fins; the outer surfaces of which are covered with scales. Pectoral fins 
pointed, appearing acute when depressed, ventrals rounded, edge of dorsal 
convex on the anterior, concave on the posterior half, caudal notched. 
Color in spirits gray above, lighter below, the dark color resulting from 
numerous closely opposed black specks. Pectoral fins largely black, bordered 
by white; dorsal and caudal broadly edged with black, ventrals black, edged 
with white, the dark area appearing as a well defined black oval spot when the 
fin is not spread; anal immaculate. Lining of gill chamber black, the color 
showing through the translucent opercle. The bases of pectorals and ventrals 
were bright yellow when the specimen was fresh. 
This dainty little fish was found by Moseley in the market of Honolulu, 
where he made a valuable and interesting collection of fishes. 
It is closely related to the two known species of the genus, Gonorhynchus 
gonorhynchus (Gmelin) from the Indian-Australian region and Gonorhynchus 
abbreviatus Schlegel from Japan. 
The Hawaiian species differs from both these in having a much larger eye 
and a longer head. The color of the ventral fins differs also, those of G. 
moseleyi having a large sharply defined central oval black blotch, not covering 
the posterior part of the fin as in the others. 
Comparisons follow with Gonorhynchus gonorhynchus from Port Jackson 
and Lord Howe Islands and G. abbreviatus from Yokohama. 
se fet LORD HOWE ISLAND SAtenan TORORA = 
(G. mose- G. gon rhynchus G. cono- G.r bbre x 
ey?) rhync'us viatus 
Length to base of caudal in milli- | 
SHOUT tos n ook Sin oer OG he ck bts Aiease ol ee 122 89 217 250 
Depth body in hundredths of length. . 0.11 0.11 0.10 0.115 0.125 
Depth caudal peduncle............. 0.058 0:05. | 0:05 0.058 0.056 
Length head. oes sre soreac ates 0.26 0.245) 0.24 0.21 0.22 
Length snouts Vaciercs se eeizion a] |) ee 0.095 | 0.098 0.08 0.095 
Diameter eye ya clues. sircante aieoans ts 0.065 0.05 0.05 0.045 0.05 
Width interorbital area (skull)...... 0.035 0.025 0.023 0.03 0.035 
OTSEL TAY Et verte creotuten sot ale Beater I ae | 10 | 10 11 8 
ANAL PAYS Atte beatae Sees ees HS eal fi J ag ii 6 
PGCLOLAL LEVSs s 25 arta acsiy atria ts pegs | 10 i) 10 11 
GNUGT SL Pei esa Geaeete mena e acetic 9 1. 9 9 9 8 
