FISHES OF HAWAIIAN ISLANDS, 
483 
Genus 234. GOBIOMORPHUS Gill. 
Allied to Asterropteryx. , Body robust, covered with large, ctenoid scales; snout blunt; mouth large, 
very oblique, with 2 series of sharp teeth in jaws, the inner depressible; side of head scaly and with 
several series of short papillary fringes; ventral rays i, 5, the fins joined at base by a narrow frenum; 
dorsals short, the first with 6 spines, the second with 12 short rays. 
The genus is distinguished from other small Eleotrids by the papillary fringes on preorbital, jaws, 
and opercles. 
Gobiomorphus Gill, Proc. Ac. Nat. Sci. Phila. 1863, 270 ( gobioides ). 
Quisquilius Jordan & Evermann, Bull. U. S. Fish Comm., XXII, 1902 (Apr. 11, 1903), 203 ( eugenius ). 
398. Gobiomorphus eugenius (Jordan & Evermann). Plate 57. « 
Head 2.8 in length; depth 3.8; eye 3.25 in head; snout 4.25; width of mouth 2.4; interorbital 2 in 
eye; D. vi— 12; A. 10; v. i, 5; scales 25,-12. 
Body robust, compressed, greatest depth about middle of belly; head large, elongate, broad, depth 
1.4 in its length, width 1.25; snout short, blunt, rounded above; jaws large, lower projecting; mouth 
large, very oblique, its posterior margin reaching below front of eye; upper jaw with 2 series of teeth, 
sharp-pointed, outer larger, the inner depressible; mandible with teeth similar to those in upper jaw; 
no teeth on vomer and palatines; tongue truncate, front margin not notched; eye large, high, anterior; 
nostrils separated, anterior in small tube, posterior close to upper front margin of eye; interorbital 
space narrow, very deeply furrowed; a series of fringe-like papillae running from preorbital along upper 
margin of maxillary down behind corner of mouth, where it joins another series running along under 
surface of mandible, and continued back and upward on margin of preopercle; anterior margin of 
opercle with a small vertical series of papillae, each papilla a little shorter than diameter of eye; gill- 
opening large, continued forward till nearly below posterior margin of eye; spinous dorsal rather 
small, spines flexible, with tips produced in short, filaments; soft dorsal high, median rays rather longer 
than others; anal more or less similar to soft dorsal, posterior rays very long; caudal rather large, 
round; pectoral broad, round, equal to head; ventrals small, 1.25 in head, sharp-pointed, and joined 
at base of inner rays by a narrow frenum; caudal peduncle compressed, its length 1.6 in head, depth 
2.4; scales large, ctenoid, those on upper part of head very small; snout, interorbital space, jaws, and 
lower surface of head naked; no lateral line. 
Color in life (field No. 03554), body with transverse bands of dark brown with olivaceous tinge 
alternating with dirty white; edges of scales in dark brown portions lighter; dorsal, anal, and caudal 
dark brown, edged in part with white; pectoral light reddish brown. 
Color in alcohol, brown; 12 dark brown cross bands on side, the last 6 very broad, much broader 
than the pale interspaces; vertical fins dark slaty; pectoral pale slaty; ventral pale on outer posterior 
portion, blackish slaty on inner. 
Honolulu and Laysan; not rare. We have 6 examples from Honolulu and 1 from Waikiki, and 
the Albatross obtained the species at Laysan Island. Length 0.8 to 1.4 inches. 
Quisquilius eugenius Jordan & Evermann, Bull. U. S. Fish Comm., XXII, 1902 (Apr. 11, 1903), 203, Waikiki, Oahu Island; 
Snyder, op. cit. (Jan. 19, 1904), 536 (Laysan Island). 
Genus 235. MAPO Smitt. 
This genus differs from Gobius in the emarginate tongue and in the shorter, broader head; pectoral 
fins with silky rays; cheeks and opercles naked. 
The genus Gobius is not represented in Hawaiian waters. 
Mapo Smitt, Ofv. Kong. Vet. Akad. Stockholm, 1899, 543 ( soporator ). 
399. Mapo fuscus (Riippell). “Oopu.” Fig. 212. 
Head 3.4 in length; depth 4.8; eye 5.25 in head; snout 3.5; interorbital 4.35; D. vi-11; A. 9; 
P. 25, filaments included; scales 38,-12. 
Body elongate, depressed in front, compressed behind, greatest depth about middle of belly; head 
elongate, broad, depressed, its width 1.2 in its length; depth 1.4; snout blunt, broad, its upper profile 
convex; mouth broad, maxillary reaching posteriorly below middle of eye; lips rather thick, fleshy, 
Quisquilius eugenius on plate. 
