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89 (81,82,88). Lateral surface of body below horizontal myosepta (or lateral mid- line), exclusive of melanophores associated with horizontal myosepta, air bladder, visceral cavity (peri- toneum), or gut, a. with:$5 melanophores (Fig. 45) . . . . . . . . . . . . . . . . . C. platyrhynchus b. with ~ melanophores (Figs. 46, 74) .. 101 90 (66). Longitudinal eye diameter a. 22-23% of head length ...... C. latipinnis b. 24-25% of head length . . . . . . . . . . . . . 92 c. 26-27% of head length ....... X. texanus d. 28-32% of head length . . . . . . . . . . .. 139 e. 33% of head length .......... C. ardens 91 (65,66,76,77). Longitudinal eye diameter a. 22-23% of head length ...... C. latipinnis b. 24-25% of head length ............. 92 c. 26-32% of head length . . . . . . . X. texanus 92 (90,91). Length of base of dorsal fIn (origin to insertion of dorsal rID) a. 14-15% SL . . . . . . . . . . . . . . . C. /atipinnis b. 16-17% SL . . . . . . . . . . . . . . . . . . . . . . 93 c. 18-21% SL . . . . . . . . . . . . . . . . X. texanus 93 (92). Dorsal rID length a. 20% SL . . . . . . . . . . . . . . . . . C. /atipinnis b. 21-24% SL . . . . . . . . . . . . . . . . . . . .. 107 c. 25-29% SL . . . . . . . . . . . . . . . . X. texanus 94 (80). Longitudinal eye diameter a. 25-27% of head length . . . C. platyrhynchus b. 28% of head length ............... 95 c. 29-33% of head length . . . . . . . . C. ardens 95 (94). Length of base of dorsal rID (origin to insertion of dorsal rID) a. 11-13% SL. . . . . . . . . . . . C.p/atyrhynchus b. 14% SL . . . . . . . . . . . . . . . . . . . . . . . . 96 c. 15-16% SL . . . . . . . . . . . . . . . . . C. ardens 96 (95). Dorsal rm length a. 15-17% SL. . . . . ... .. . . C.platyrhynchus b. 18-19% SL . . . . . . . . . . . . . . . . . . . .. 108 c. 2O%SL ................... c.ardens 97 (84). Longitudinal eye diameter a. 22-24% of head length ..... C. discobolus b. 25-27% of head length . . . . . . . . . . . . . 98 c. 28% of head length .............. 10S d. 29-34% of head length . . . . C. commersoni 98 (97). Length of base of dorsal rID (origin to insertion of dorsal rID) a. 11% SL . . . . . . . . . . . . . . . . . . . . . .. 103 b. 12-14% SL . . . . . . . . . . . . . . . . . . . . . . 99 c. 15% SL . . . . . . . . . . . . . . . . . . . . . .. 100 99 (98). Dorsal rID length a. 15-16% SL . . . . . . . . . . . . . . . . . . . .. 123 b. 17-19% SL . . . . . . . . . . . . . . . . . . . .. 115 c. 20-21% SL . . . . . . . . . . . . . . . . . . . .. 129 d. 22% SL . . . . . . . . . . . . . . . C. commersoni 100 (98). Dorsal rID length a. 15-16% SL ............ C. commersoni b. 17-21% SL .................... 129 c. 22% SL . . . . . . . . . . . . . . . C. commersoni 101 (89). Longitudinal eye diameter a. 22-24% of head length . . . . . C. discobo/us b. 25-27% of head length .. . . . . . . . . .. 102 c. 28% of head length ..... C. platyrhynchus 102 (101). Length of base of dorsal rID (origin to insertion of dorsal rID) a. 11-14% SL .................... 103 b. 15% SL . . . . . . . . . . . . . . . . C. discobo/us 103 (98,102). Dorsal rID length a. 15-16% SL ........... C. p/atyrhynchus b. 17-19% SL .................... 114 c. 20-21% SL ............. C. discobo/us 104 (87). Longitudinal eye diameter a. 25-28% of head length ............ 105 b. 29-34% of head length .. . . C. commersoni 105 (97,104). Length of base of dorsal rID (origin to insertion of dorsal fIn) a. 11% SL . . . . . . . . . . . . . . C. platyrhynchus b. 12-14% SL .................... 106 c. 15% SL . . . . . . . . . . . . . . . C. commersoni 106 (10S). Dorsal rID length a. 15-19% SL .................... 123 b. 20-22% SL ............ C. commersoni 107 (93). Caudal rID length (total length minus standard length) a. 17-19% SL .............. C. latipinnis b. 20-26% SL .............. C. latipinnis X. texanus c. 27-28% SL ............... X. texanus 108 (96). Pigment over ventral to ventro-Iateral surfaces of gill covers (opercula) a. absent or present but not in distinct oblique rows of 3 or more melanophores near or along ventral margin of either preopercle (Figs. 19,75) ........... 109 b. present in a distinct oblique row of 3 or more melanophores near or along ven- tral margin of one or both preopercles (Fig. 74) ............. C. platyrhynchus 109 (108). Pigment in anal rID a. absent or present but very light with only a few (:$5) melanophores (Figs. 19,75) ........................ 110 b. present but more prominent with many (~) melanophores . . . . . . . . . . . C. ardens 110 (109). Number of myomeres to posterior margin of vent a. 32-33................ C. platyrhynchus b. 34-37 . . . . . . . . . . . . . . . . . . . . . . . .. 111 c. 38 . . . . . . . . . . . . . . . . . . . . . C. ardens 111 (110). Total number of myomeres a. 43-47......................... 112 79