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<br />c. pigmented but not in distinct oblique <br />rows (Figs. 16) . . .. . .. . .. . .. . .. . .. 60 <br /> <br />57 (56). Lateral surface of head posterior to <br />eyes <br />a. unpigmented (Fig. 44) ............. 58 <br />b. pigmented (at least 1 melanophore) <br />(Figs. 16, 86) .................... 59 <br /> <br />58 (52,57). Lateral surface of body above hori- <br />zontal myosepta (lateral midline) <br />and below dorsa-lateral surface <br />(exclusive of melanophores asso- <br />ciated with horizontal myosepta, air <br />bladder, or visceral peritoneum) <br />a. unpigmented (Fig. 86) ............ 112 <br />b. pigmented (at least 1 melanophore; Fig. <br />44) ................... C. discobolus <br /> <br />59 (57). Lateral surface of body above horizon- <br />tal myosepta (lateral midline) and <br />below dorsa-lateral surface (exclu- <br />sive of melanophores associated with <br />horizontal myosepta, air bladder, or <br />visceral peritoneum) <br />a. unpigmented (Figs. 16, 86) ......... 113 <br />b. pigmented with 1-5 melanophores (Fig. <br /> <br />44) .......................... 103 <br />c. pigmented with 2:6 melanophores (Fig. <br />46) ................... C. discobolus <br /> <br />60 (54,56). Lateral surface of head posterior to <br />eyes <br />a. unpigmented (Fig. 44) ....... X. texanus <br />b. pigmented (at least 1 melanophore) <br />(Fags. 16, 86) .................... 61 <br /> <br />61 (60). Lateral surface of body above horizon- <br />tal myosepta (lateral midline) and <br />below dorsa-lateral surface (exclu- <br />sive of melanophores associated with <br />horizontal myosepta, air bladder, or <br />visceral peritoneum) <br />a. unpigmented (Figs. 16, 86) ......... 109 <br />b. pigmented with 1-5 melanophores (Fig. <br /> <br />17) ...................... C. ardens <br /> <br />62 (47). Dorsal surface lateral to midline from <br />shortly behind head to about 2/3 <br />distance to last myomeres <br />a. with distinct lines of melanophores along <br />one or both sides of dorsal midline (Fig. <br /> <br />16 ........................... 63 <br />b. without distinct lines of melanophores <br />along either side of dorsal midline (Fig. <br />44) ................... C. discobolus <br /> <br />63 (62). Dorsal midline from shortly behind <br />head to near last myomeres <br />a. with 2:25 melanophores in a distinct <br />continuous or nearly continuous line <br />(Fig. 43) ............... C. discobolus <br />b. with 2:25 melanophores but in one or <br />more shorter segments or a distinctly <br />discontinuous line (Fig. 45) . . . . . . . . . . 64 <br /> <br />c. with s24 melanophores in one or more <br />short lines, a discontinuous, well-spaced <br />line or (rarely) no distinct line of <br />melanophores (Fig. 16) ....... C. ardens <br />64 (63). Ventral to ventro-Iateral surfaces of gill <br />covers (opercula) <br />a. unpigmented (Fig. 44) ............. 70 <br />b. pigmented (at least 1 melanophore; Fig. <br />16) ..................... C.ardens <br /> <br />65 (30). Ventral to ventro-Iateral surfaces of gill <br />covers (opercula) <br />a. unpigmented (Fags. 44, 58) .......... 66 <br />b. pigmented (at least 1 melanophore; Fig. <br />16) ..................... C.ardens <br /> <br />66 (65). Chin (anterior ventral surface of lower <br />jaw) <br />a. unpigmented (Fags. 16, 44, 58) ....... 67 <br />b. pigmented (at least 1 melanophore; Fig. <br /> <br />17) .. . . . . . . . . . . . . . . . . . . . . . . . . 70 <br /> <br />67 (66). Lateral surface of head posterior to <br />eyes <br />a. unpigmented (Fig. 44) ..... C. discobolus <br />b. pigmented (at least 1 melanophore; Figs. <br /> <br />16, 58) . . . . . . . . . . . . . . . . . . . . . . . . . 68 <br /> <br />68 (67). Lateral surface of body above horizon- <br />tal myosepta (lateral midline) and <br />below dorsa-lateral surface (exclu- <br />sive of melanophores associated <br />with horizontal myosepta, air <br />bladder, or visceral peritoneum) <br />a. unpigmented (Figs. 16, 58) ......... 107 <br />b. pigmented with 1-5 melanophores (Fig. <br /> <br />44) ... . . . . . . . . . . . . . . . . . . . . . . . 69 <br />c. pigmented with 2:6 melanophores (Fags. <br />45, 46) . . . . . . . . . . . . . . . . . C. discobolus <br /> <br />69 (68). Lateral surface of body below horizon- <br />tal myosepta (lateral midline) <br />(exclusive of melanophores asso- <br />ciated with horizontal myosepta, air <br />bladder, visceral peritoneum, or gut) <br />a. unpigmented (Figs. 16, 44, 58) ...... 107 <br />b. pigmented (at least 1 melanophore) <br />(Fags. 45, 46) ................... 103 <br /> <br />70 (64,66). Lateral surface of head posterior to <br />eyes <br />a. unpigmented (Fig. 44) ..... C. discobolus <br />b. pigmented (at least 1 melanophore; Fig. <br /> <br />16) .......................... 71 <br /> <br />71 (70). Lateral surface of body above horizon- <br />tal myosepta (lateral midline) and <br />below dorsa-lateral surface (exclu- <br />sive of melanophores associated <br />with horizontal myosepta, air <br />bladder, or visceral peritoneum) <br />a. unpigmented or pigmented with s5 <br />melanophores (Fags. 16, 44) ........ 103 <br />b. pigmented with 2:6 melanophores (Figs. <br />45, 46) . . . . . . . . . . . . . . . . . C. discobolus <br /> <br />51 <br />