199 1a. dorsal and ventral profile of head concave; shout slightly tubiform
1b. dorsal and ventral profile of head not markedly soncave
2a. last dorsal spine about oqual to or shorter than the first one; soft dorsal and anal low, rounded; depth 2.4-2.8
2b. last dorsal spine much longer than the first one; depth 1.8-2.4; soft dorsal and anal high, more or less pointed or angular
3a. scales between lateral line and median dorsal spines 17-18 rows; anterior nostrils with the posterior flap; caudal slightly emarginate; almost truncatc; dark with more or less distinct light vermiculating lines
3b. scales between lateral line and median dorsal spines 20-23 rows; anterior nostrils with a low rim, slightly produced into a very short flap posteriorly; caudal truncate in young, forked in adults; brown, spotted with white
4a. scales between lateral line and median dorsal spines 30-35 rows; back and sides with light spots, more or less confluent into longitudinal bands; caudal omarginate, truncate in young
4b.scales between lateral line and median dorsal spines 18-24 rows
5a.cross bands on snout, interobital space, and occiput; a broad dark band from chin through eye to origin of dorsal, a second one from below spinous dorsal to bases of pectorals; back with
dark spots; depts; 1.9-2.0