382 BULLETIN OF THE BUREAU OF FISHERIES. 



a. Scales large, ctenoid; dorsal and anal fins short. 

 b. Tongue truncate or rounded at tip; isthmus rather broad; lower jaw usually not strongly projecting. 

 c. Pectoral without silk-like rays above. 



d. Preopercle with 2 small hooked spines at angle; dorsal spine rigid Oplopomus 



dd. Preopercle unarmed; shoulder-girdle without fleshy slips; dorsal spines slender. 



e. Dorsal spines 7 Aboma 



ee. Dorsal spines 6. 



/. Head almost spherical; body short and plump; small canines present Paragobiodon 



ff. Head not spherical. 



g. Body before dorsal fin largely naked; head very large; mouth sub vertical Zonogobius 



gg. Body before dorsal chiefly scaled. 



h. Ventrals short, cup-like; body elongate; head depressed; small canines present Vailima 



hh. Ventrals well developed. 



i. Head very large, with cross-lines of minute cirri (as in Goblomorphas and in Mars) Drombvs 



it Head without cross-lines of tubes or cirri Rhinogobius 



cc. Pectoral fin with several free silk-ltke rays above 'Gobius 



bb. Tongue emarginate at tip. 



;. Pectoral with free silk-like rays; dorsal spines, G; mouth moderate Mapo 



jj. Pectoral without free silk-like rays above; mouth large, oblique, the ch:n very prominent Glossogobius 



aa. Scales 36 or more; pectoral without silk-like rays. 



k. Tongue emarginate; lower jaw projecting; mouth large Ch^enogobius 



kk. Tongue entire (so far as known). 



I. Shoulder-girdle with fleshy slips or flaps; dorsal and anal short, of about 11 or 12 rays; scales moderate, ctenoid; 



preorbital region broad; tongue adnate to floor of mouth; fresh-water species. 



V. Cheeks naked Awaous 



I". Cheeks closely scaled Exyrias 



II. Shoulder-girdle without fleshy flaps; dorsal and anal long (15 to 20 rays). 

 to. Body opaque; caudal rounded; dorsal spines G. 



n. Scales moderate (50 to 60), ctenoid; lower jaw with small canines Amblygobius 



nn. Scales minute, cycloid; no canines; jaws not opening widely Cryptocentri's 



mm. Body elongate, translucent; caudal emarginate; mouth small; dorsal spines seven Vitraria 



XX Caudal fin lanceolate, much produced; no barbels at chin. 



o. Eye with fleshy cirrus above ; Pselaphias 



oo. Eye without cirrus. 



p. Mouth very large, the maxillary produced backward somewhat as in Opisthognathus Waitea 



pp. Mouth moderate; no canines; soft dorsal and anal moderate, of 12 to 20 rays. 



(/. Outer teeth moderately enlarged; upper pectoral rays silk-like Gobiichthys 



-717. Outer teeth setaceous and movable; lower jaws flat and thin; no silk-like rays Gobtonellus 



W1V. Teeth all uniserial; canines present; soft caudal more or less pointed. 



r. Scales rather large (25 to 35); soft dorsal and anal short Gobioptertjs 



rr. Scales moderate (40 to 50); soft dorsal and anal of about 23 rays Apocryptodon 



rrr. Scales very minute, about 200; soft dorsal and anal of about 30 rays Fseudapocryptes 



VV. Vomer with about 3 large blunt teeth; head with numerous lines of small cirri running in various directions 



scales rather small; fins moderate Mars 



UU. Body naked or very nearly so. 

 s. Body rather elongate, not greatly compressed. 



t. Dorsal spines 6; snout very "blunt; soft dorsal longer than anal Kelloggella 



ss. Body greatly compressed and elevated. " 



u. Canines present, small Gobiodon 



uu. Canines wanting Pseudogobiodon 



it. Ventral fins short, round, cup-shaped, adnate to the belly; outer teeth more or less flexible, peculiarly formed. 

 v. Body scaly or chiefly so. 

 w. Teeth clavate, not pointed. 



x. Scales small (50 to 80); body well scaled Sicyopterus 



xx. Seales large, about -10; trunk partly naked anteriorly Microsicydium 



vv. Body naked or largely naked; upper front teeth tricuspid Lentipes 



AA. Gobiodin^k Soft dorsal and anal very long, joined to the caudal; body eel-shaped, the scales minute or wanting 

 no pit above opercle; eyes minute; teeth very long, curved; dorsal moderate, its rays about vi, 16 Gobioides 



BOSTRYCHTTP Lacepede. 

 Eleotrids with vomerine teeth, as in the American genus Philypnus. 



1397. Bostrychus sinensis Lacepede. Oualan; Ivanathia, Fiji; East Indies; China. 



VALENCIENNEA Bleeker. 



1398. Valenciennea muralis Quoy & Gaimard. Tucopia, Vanicolo; Fiji; Fast Indies; Australia. 



1399. Valenciennea longipinnis Lay & Bennett. Fiji (Gunther), Riukiu Is. 



Eleotris longipinnis Lay & Bennett, Zool. Beechey's Voyage, 64, tab. 20, fig. 30, Riukiu Is. Gunther, Fische der 

 Stidsee, 190, Fiji. 



