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<br />X. texanus <br />d. 49 ................... C. discobolus <br />X. texanus <br /> <br />255 (201,202). Longitudinal eye diameter <br />a. 24-30% of head length............ 256 <br />b. 31-34% of head length . . . . . . . . . . .. 257 <br />c. 35% of head length .............. 279 <br />d. 36-38% of head length ........ C. ardens <br /> <br />256 (255). Pigment over ventral to ventro-lateral <br />surfaces of gill covers (opercula) <br />a. absent or present but not in distinct <br />oblique rows (Figs. 45, 59) ......... 259 <br />b. present in a distinct oblique row of 3 or <br />more melanophores near or along ven- <br />tral margin of one or both preopercles <br />(Fig. 17) ................ C. latipinnis <br /> <br />257 (236,255). Pigment over ventral to <br />ventro-lateral surfaces of gill covers <br />(opercula) <br />a. absent or present but not in distinct <br />oblique rows (Figs. 16, 45, 59) ...... 258 <br />b. present in a distinct oblique row of 3 or <br />more melanophores near or along ven- <br />tral margin of one or both preopercles <br />(Fig. 17) ...................... 279 <br /> <br />258 (257). Pigment on ventral surface of heart <br />region <br />a. absent (Figs. 45, 59) . . . . . . . . . . . . .. 259 <br />b. present (Figs. 17, 44, 58) .......... 262 <br /> <br />259 (237,256,258). Lateral surface of body below <br />horizontal myosepta (or lateral <br />midline) exclusive of melanophores <br />associated with horizontal myosepta, <br />air bladder, visceral cavity (peri- <br />toneum), or gut, <br />a. unpigmented or with s5 melanophores <br />(Figs. 45, 59) ................... 260 <br />b. pigmented with ~ melanophores (FIg. <br />46) ................... C. discobolus <br /> <br />260 (259). Length from anterior margin of snout <br />to posterior margin of vent <br />a. 76-80% SL . . . . . . . . . . . . . . . . . . . .. 261 <br />b. 81% SL . . . . . . . . . . . . . . . . C. discobolus <br /> <br />261 (242,260). Number of myomeres to <br />posterior margin of vent <br />a. 35 ................... C. discobolus <br /> <br />b. 36-40 . . . . . . . . . . . . . . . . . . . . . . . .. 301 <br /> <br />262 (258). Lateral surface of body below <br />horizontal myosepta (or lateral <br />midline) exclusive of melanophores <br />associated with horizontal myosepta, <br />air bladder, visceral cavity (peri- <br />toneum), or gut, <br />a. unpigmented or with s5 melanophores <br />(Figs. 17,45,59) ................ 263 <br />b. pigmented with ~6 melanophores (Fig. <br />46) ................... C.discobdus <br /> <br />263 (262). Length from anterior margin of snout <br />to posterior margin of vent <br />a. 76-80% SL .................... 264 <br />b. 81% SL . . . . . . . . . . . . . . . . C. discobolus <br /> <br />264 (245,263). Number of myomeres to poster- <br />ior margin of vent <br /> <br />a. 34 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />b. 35 . . . . . . . . . . . . . . . . . . . . . . . .. 277 <br />c. 36-38......................... 265 <br /> <br />d. 39-40 . . . . . . . . . . . . . . . . . . . . . . . .. 301 <br /> <br />265 (264). Total number of myomeres <br /> <br />a. 43-45 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />b. 46 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />C. latipinnis <br /> <br />c. 47-48..................... C. ardens <br />C. discobolus <br />C. latipinnis <br />d. 49 . . . . . . . . . . . . . . . . . . C. discobolus <br />C. latipinnis <br /> <br />266 (203,204,206). Longitudinal eye diameter <br />a. 24-26% of head length . . . . . . C. latipinnis <br />b. 27-30% of head length . . . . . . . . . . .. 306 <br />c. 31-33% of head length............ 267 <br />d. 34-35% of head length ... . . . . . . . .. 279 <br />e. 36-38% of head length . . . . . . . . C. ardens <br /> <br />267 (239,266). Pigment on ventral surface of <br />heart region <br />a. absent (Figs. 59, 88) . . . . . . . . . . . . " 306 <br />b. present (Figs. 17, 58, 87) .......... 268 <br /> <br />268 (267). Length from anterior margin of snout <br />to posterior margin of vent <br />a. 76-'n% SL .................... 280 <br />b. 78-80% SL .................... 269 <br />c. 81-84% SL ............... X. texanus <br /> <br />U,9 (268). Number of myomeres to posterior <br />margin of vent <br /> <br />a. 34-35 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />b. 36-38 . . . . . . . . . . . . . . . . . . . . . . . .. 270 <br />c. 39-40......................... 308 <br />d. 41 . . . . . . . . . . . . . . . . . . . . X. texanus <br /> <br />270 (269). Total number of myomeres <br /> <br />a. 43 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />b. 44-45 . . . . . . . . . . . . . . . . . . . . . C. ardens <br />X. texanus <br /> <br />c. 46-48..................... C. ardens <br />C. latipinnis <br />X. leXOnus <br /> <br />d. 49 . . . . . . . . . . . . . . . . . . . C. latipinnis <br />X. texanus <br /> <br />271 (22,193,194). Longitudinal eye diameter <br />a. 24-30% of head length . . . . . C. discobolus <br />b. 31-34% of head length .. . . . . . . . . .. 272 <br />c. 35-38% of head length. . . . . . . . C. ardens <br /> <br />272 (248,271). Pigment over ventral to <br />ventro-lateral surfaces of gill covers <br />(opercula) <br /> <br />70 <br />