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28 (27). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct lines of melanophores along one or both sides of dorsal midline (Figs. 16, 58) .................... 29 b. without distinct lines of melanophores along either side of dorsal midline (Fig. 44) ................... C. discobolus 29 (28). Melanophores in lines lateral (and parallel) to dorsal midline between head and 2/3 distance to last myomeres a. mostly in single me (Fig. 16) ........ 30 b. mostly in obliquely oriented pairs or groups resulting in a "herring bone" or "tractor tread" pattern (Fig. 58) . . . . . . . . . . . . . . . . . . . . C. latipinnis 30 (29). Dorsal midline from shortly behind head to near last myomeres a. with ~ melanophores in a distinct continuous or nearly continuous line (Fig. 43) ............... C. discobolus b. with ~ melanophores but in one or more shorter segments or a distinctly discontinuous line (Fig. 45) . . . . . . . . . . 65 c. with ~ melanophores in one or more short lines, a discontinuous, well-spaced line or (rarely) no distinct line of melanophores (Figs. 16, 59) ......... 31 31 (30). Ventral to ventro-lateral surfaces of gill covers (opercula) a. unpigmented (Fig. 58) ............. 32 b. pigmented (Fig. 17) .......... C. ardens 32 (31). Chin (anterior ventral surface of lower jaw) a. unpigmented (Figs. 16, 58) .......... 33 b. pigmented (Fig. 17) .......... C. ardens 33 (32). Lateral surface of body above horizon- tal myosepta (lateral midline) and below dorso-lateral surface (exclu- sive of pigment associated with horizontal myosepta, air bladder, or visceral peritoneum) a. unpigmented (Figs. 16, 58) ......... 105 b. pigmented (at least 1 melanophore) (Fig. 17) ....................... 34 34 (33). Lateral surface of body below horizon- tal myosepta (lateral midline) (exclusive of pigment associated with horizontal myosepta, air bladder, visceral peritoneum, or gut) a. unpigmented (Figs. 16, 58) ......... 105 b. pigmented with at least 1 melanophore (Fig. 17) .................. C. ardens 35 (20). Ventral midline from shortly behind heart region to near vent a. with ~1 melanophores (Fig. 44) . . . . . . . . . . . . . . . . . . C. discobolus b. with 1-20 melanophores (Fig. 58) ..... 36 c. without pigment . . . . . . . . . . C. discobolus 36 (35). Dorsal body pigmentation between head and last myomere a. scattered with no distinct lines of melan- ophores on or lateral (and parallel) to dorsal midline (Fig. 44) .... C. discobolus b. including at least a partial distinct line of melanophores on or lateral (and parallel) to dorsal midline (Fig. 58) ... 37 37 (36). Dorsal surface lateral to midline from shortly behind head to about 2/3 distance to last myomeres a. with distinct lines of melanophores along one or both sides of dorsal midline (Fig. 58) ., . . . . . . . . . . . . . . . . . . . . . . . . 38 b. without distinct lines of melanophores along either side of dorsal midline (Fig. 44) .................. C. discobolus 38 (37). Melanophores in lines lateral (and parallel) to dorsal midline between head and 2/3 distance to last myomeres a. mostly in single file (Fig. 43) ........ 39 b. mostly in obliquely oriented pairs or groups resulting in a "herring bone" or "tractor tread" pattern (Fig. 58) C. latipinnis 39 (38). Dorsal midline from shortly behind head to near last myomeres a. with ~ melanophores in a distinct continuous or nearly continuous line (Fig. 43) ............... C. discobolus b. with ~ melanophores but in one or more shorter segments or a distinctly discontinuous line (Fig. 45) ......... 40 c. with.s24 melanophores in one or more short lines, a discontinuous, well-spaced line or ( rarely) no distinct line of melanophores (Fig. 58) ..... C. latipinnis 40 (39). Chin (anterior ventral surface of lower jaw) a. unpigmented (Figs. 44, 58) .......... 41 b. pigmented (Fig. 30) ....... C. discobolus 41 (40). Lateral surface of head posterior to eyes a. unpigmented (Fig. 44) ..... C. discobolus b. pigmented (at least 1 melanophore) (Fig. 58) ....................... 42 42 (41). Lateral surface of body above horizon- tal myosepta (lateral midline) and below dorso-lateral surface (exclu- sive of melanophores associated with horizontal myosepta, air bladder, or visceral peritoneum) a. unpigmented (Fig. 58) ..... C. discobolus C.latipinnis 49