FISHES OF HAWAIIAN ISLANDS. 
493 
slaty black blotch from below eye across cheek behind maxillary; a dull bluish blotch at base of pec- 
toral fin above; fins grayish dusky, the dorsals with narrow submarginal pale bar, rest of both fins 
with reticulating dusky lines. Described from an example (No. 05228) taken at Honolulu. 
A common species, widely distributed throughout the tropical Pacific, abundant among the 
Hawaiian Islands. We have 74 specimens from Honolulu, 11 from Waikiki, 4 from Moanalua, 2 from 
Kaneohe Creek, near Heeia, and 38 from Ililo, ranging in length from 0.8 to 5.7 inches. 
Gobius genivlttatus Cuvier & Valenciennes, Hist. Nat. Poiss., XII, 64, 1837, Tahiti; Gunther, Fische der Siidsee, VI, 170, 
taf. CX, Fig. C, 1877 (Tahiti, Navigator, Fiji, and Sandwich islands). 
Awaous genivittalus, Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 517 (Sandwich Islands); Jenkins, Bull. U. S. Fish Comm., XXII, 
1902 (Sept. 23, 1903), 502 (Honolulu; fresh waters); Snyder, op. cit. (Jan. 19, 1904), 536 (Honolulu, Waimea, Hana 
pepe, Hanalei, Huleia rivers, Kauai; Anahulu River, Oahu). 
410. Awaous stamineus (Eydoux & Souleyet). “Oopu.” 
Head 3.2 in length; depth 4; eye 8.6 in head; snout 2.2; interorbital 5; D. vi-10; A. 10; scales 
63,— 18. 
Body short and stout, heavy forward, compressed only posteriorly, head large, broad; snout rather 
long, anterior profile only slightly convex from tip of snout to origin of first dorsal fin; eyes small, high 
up, the interorbital space little convex; mouth large, nearly horizontal, very broad, the greatest width 2.2 
in head; lower jaw included, lips rather thick; maxillary reaching orbit; teeth in each jaw in a broad 
villiform band; tongue rounded, adnate to floor of mouth; gill-openings long, separate, the isthmus 
broad, length of gill-opening equaling snout; shoulder-girdle with 2 short, fleshy papillae. Head 
entirely naked, breast naked, body densely scaled, the scales anteriorly somewhat reduced. Origin of 
spinous dorsal midway between tip of snout and base of last dorsal ray; base of spinous dorsal 2.7 in 
head; length of dorsal spines 1.1 in snout; soft dorsal high, the anterior rays 2.5 in head, the posterior 
about 3; anal similar to soft dorsal, the rays about equal; caudal long, rounded, the middle rays 1.5 
in head; ventral disk short, rounded, its length twice the width of its base or equal to snout; pectoral 
long, pointed, 1.4 in head. 
Color in life (No. 03269), dark olivaceous, with obscure dusky blotches on side; belly pale; a dark 
blotch at base of caudal fin; dorsals pale yellow, crossed by about 7 narrow blackish bars approxi- 
mately following the margin; caudal similarly marked, with about 7 vertical blackish bars; anal dusky; 
pectoral and ventrals dusky olive. Another example (No. 03270), 5 inches long, differs from the one 
just described in having the sides more plainly vermiculated with brownish lines and in having the 
spot on caudal peduncle and bars on fins plainer. 
Color in alcohol, pale olivaceous on back and sides, yellowish white below; side with a median 
series of irregular large blackish blotches, most distinct in the young; a large black blotch at base of 
caudal fin; spinous dorsal whitish, with blackish retrieulations; soft dorsal whitish, crossed by about 
7 or 8 zigzag blackish lines; caudal similar to soft dorsal, crossed by about 9 vertical zigzag blackish 
bars; anal dusky whitish, darkest along the middle; pectoral dusky, palest at base; a small blackish 
blotch at base of upper rays. 
This is the common Oopu of the fresh-water streams and river mouths, and is one of the most 
abundant gobies occurring among the Hawaiian Islands. Numerous specimens were obtained by us 
at Honolulu, Waialua, Hilo, Manna Loa, and Heneohe Creek at Heeia and Kilihi Creek in Pilihi 
Valley, varying from 0.8 to 12 inches in length. 
Gobius stamineus Eydoux & Souleyet, Voy. Bonite, Poiss., 179, pi. v, fig. 5, 1841, Sandwich Islands; Gunther, Rep. Shore 
Fish., Challenger, Zool., I, Part VI, 59, 1880 (fresh waters of Honolulu: streams of Hawaii). 
Awaous crassilabris, Streets, Bull. U. S. Nat. Mus., No. 7, 59, 1877 (fresh-water streams of Oahu); Fowler, Proe. Ac. Nat. Sei. 
Phila. 1900, 517 (Sandwich Islands); not of Gunther. 
Gobius papuensis, Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 517 (Sandwich Islands); not of Cuvier & Valenciennes. 
Awaous stamineus, Jenkins, Bull, U. S. Fish Comm., XXII, 1902 (Sept. 23, 1903), 502 (Honolulu); Snyder, op. cit. (Jan. 19, 
1904), (Anahulu River, Oahu; Waimea, Hanalei, Hanapepe, and Hulei rivers, Kauai; Wailuku River, Maui.) 
Suborder DISCOCEPH ALI. 
Bony fishes “with a suctorial transversely laminated oval disk on the upper surface of the head 
(homologous with a flat dorsal fin), thoracic ventral fins with external spines, a simple basis cranii, 
intermaxillary bones flattened, with the ascending processes deflected sideways, and with the supra- 
