90 GOBIES OP THE PHILIPPINES 



kk*. Teeth in lower jaw more or less hori- 

 zontal, in one row. 



mm 1 . Teeth in lower jaw inclined out- 

 ward with a pair of symphysial 

 canines behind; scales 65 to 75; 

 no snout flap with teatlike pro- 

 jections; second dorsal with 12 to 

 27 rays; anal 13 to 26 rays. 



Parapocryptes. 



mm 1 . Lower jaw with long, blunt, hori- 

 zontal teeth, no symphysial ca- 

 nines; head very flat anteriorly; 

 scales 75 to 90; a pair of large 

 teatlike snout flaps hanging 

 down over mouth; second dorsal 

 with 24 to 26 rays; anal 23 to 



26 rays Apocryptichthys. 



cc 1 . First dorsal spines more than six. 



nn\ Dorsal VIII, 1-14 to 18; scales 68 to 72; cheeks 



more or less scaled Acanthogobius. 



nn\ Dorsal IX or VIII, 1-18 or 19; scales 88 to 90; 

 cheeks entirely naked; posterior part very 

 slender and greatly elongated. 



Synechogobius. 

 g*. Barbels on chin, or edge of lower jaw, or underside of head, 



or on all of them. 

 oo 1 . First dorsal spines six. 

 pp 1 . Two fleshy barbels on chin; head naked; caudal rounded, 



shorter than head, without an ocellus Illana. 



pp 1 . Many small barbels under lower jaw; head scaled; caudal 

 pointed, much longer than head, a black ocellus near 



its base , Parachaeturichthys. 



oo*. First dorsal spines more than six. 



qq 1 . First dorsal seven; head very large, broad, flat, with 

 many barbels on underside; first row of teeth in each 



jaw entirely exposed Lophiogobius. 



qq 1 . First dorsal eight; three pairs of barbels under lower 



jaw. 



rr 1 . Second dorsal I, 14 to 16; anal I, 12 to 13; scales 35 to 



40; no fleshy papillae on inner edge of shoulder girdle. 



Amblychaeturichthys. 



rr 4 . Second dorsal I, 21 to 24; anal I, 17 to 19; scales 47 to 

 57; three fleshy papillae on inner edge of shoulder 



girdle Chaeturichthys. 



f. Teeth more or less bilobed or tricuspid. 



88\ One row of teeth in each jaw, bilobed and more or less hori- 

 zontal in lower jaw, with a pair of postsymphysial canines. 



Apocryptodon. 

 '. Two rows of teeth in each jaw, the outer row tricuspid. 



tt\ Sides of head with K*WS of barbels Triaenopogon. 



tt*. No barbels on head Tridentiger. 



