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b. with ~1 melanophores in a shorter or distinctly discontinuous line (Fig. 44) . . . 28 c. with ~ melanophores (Figs. 15, 43, 51) ........................... 31 28 (21). Pigment on ventral to ventro-Iateral surfaces of gill covers (opercula) a. absent (Fig. 43) .................. 29 b. present (Figs. 29, 30) ..... C. commersoni 29 (28). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct continuous or nearly contin- uous lines of melanophores along (paral- lel to) each side of dorsal midline (Fig. 30) .................. C. commersoni b. with distinctly shorter or discontinuous lines of melanophores along one or both sides of dorsal midline (Figs. 43, 85) . . . 30 c. without distinct lines of melanophores along either side of dorsal midline (Figs. 44, 71) . . . . . . . . . . . . . . . . . C. discobolus 30 (29). Dorsal midline from shortly behind head to near last myomeres a. with ~ melanophores in a distinct con- tinuous or nearly continuous line or in a shorter or distinctly discontinuous line (FIgs. 30, 31, 43) ................. 60 b. with:S24 melanophores (Fig. 85) . . . . . . . . . . . . . . . . . . . C. discobolus 31 (21). Pigment on ventral to ventro-Iateral surfaces of gill covers (opercula) a. absent (Figs. 15, 43, 51) ............ 32 b. present (Figs. 16, 11) ......... C. ardens 32 (31). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct continuous or nearly contin- uous lines of melanophores along (paral- lel to) each side of dorsal midline (Fig. 51) .................... C.latipinnis b. with distinctly shorter or discontinuous lines of melanophores along one or both sides of dorsal midline (Figs. 15, 43, 85) ...........................33 c. without distinct lines of melanophores along either side of dorsal midline (Figs. 44, 71) . . . . . . . . . . . . . . . . . . . . . . . . . 48 33 (32). Dorsal midline from shortly behind head to near last myomeres a. with ~ melanophores in a distinct con- tinuous or nearly continuous line (Fig. 43) .......................... 113 b. with ~ melanophores but in a shorter or distinctly discontinuous line or with :S24 melanophores (Figs. 15, 51) .. . . . . 73 34 (18). Ventral midline from shortly behind heart region to near vent a. with ~1 melanophores in a continuous or nearly continuous line or narrow band (if ventral midline from heart to vent extends into branchial region, anter- ior to heart, most probably C. com- mersoni -- Fig. 31) (Fig. 30) ......... 38 b. with ~1 melanophores in a shorter or distinctly discontinuous line (Fig. 71) .. 35 c. with 7 to 20 melanophores (Fig. 43) ... 39 d. with ~ melanophores (Fig. 85) ...... 45 35 (34). Pigment on ventral to ventro-Iateral surfaces of gill covers (opercula) a. absent (Figs. 43, 71) . . . . . . . . . . . . . . . 36 b. present (Figs. 29, 30) .............. 38 36 (35). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct continuous or nearly contin- uous lines of melanophores along (paral- lel to) each side of dorsal midline (Fig. 30) . . . . . . . . . . . . . . . . . C. commersoni b. with distinctly shorter or discontinuous lines of melanophores along one or both sides of dorsal midline (Figs. 43, 72) . . . 37 c. without distinct lines of melanophores along either side of dorsal midline (Figs. 44, 71) . . . . . . . . . . . . . . . . . . . . . . . . . 43 37 (36). Dorsal midline from shortly behind head to near last myomeres a. with ~ melanophores in a distinct con- tinuous or nearly continuoUs line or in a shorter or distinctly discontinuous line (FIgs. 43, 71) ................... 87 b. with:S24 melanophores (Fig. 85) . . . . . . . . . . . . . . . . . . C. discobolus 38 (24,25,34,35). Dorsal surface lateral to mid- line from shortly behind head to about 2/3 distance to last myomeres a. with distinct continuous or nearly contin- uous lines of melanophores along (paral- lel to) each side of dorsal midline (Fig. 30) .... . . . . . . . . . . . . . C. commersoni b. with distinctly shorter or discontinuous lines of melanophores along one or both sides of dorsal midline (Fig. 72) or with- out distinct lines of melanophores along either side of dorsal midline (Figs. 29, 71) ... . . . . . . . . . . . . . . . . . . . . . .. 93 39 (34). Pigment on ventral to ventro-lateral surfaces of gill covers (opercula) a. absent (Figs. 15, 43, 57, 71) ......... 40 b. present (Fig. 16) ................. 44 40 (39). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct continuous or nearly contin- uous lines of melanophores along (paral- lel to) each side of dorsal midline (Fig. 51) ..... . . . . . . . . . . . . . . C. latipinnis b. with distinctly shorter or discontinuous lines of melanophores along one or both sides of dorsal midline (Figs. 15, 43) . . . 41 41