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<br />least one limb of loop fully across ventral
<br />midline but not yet with both limbs across
<br />fully to opposite side (gut phase 4) ...... 54
<br />
<br />54 (52,53). Pigmentation on lateral surfaces of
<br />peritoneum
<br />a. absent (Fig. 89) ............ X. texanus
<br />b. sparse or patchy (Fig. 33) . . . . . . . . . . . 55
<br />
<br />55 (54). Pigmentation on ventro-Iateral surfaces
<br />of peritoneum
<br />a. absent (Figs. 61, 89) . . . . . . . . . . . . . . . 57
<br />b. sparse or patchy (Fig. 33) . . . . . . . . . . . 56
<br />
<br />56 (55). Pigmentation on ventral surface of
<br />peritoneum
<br />a. absent (Figs. 61, 89) . . . . . . . . . . . . . . . 57
<br />b. sparse or patchy (Fig. 75) . . . . C. /atipinnis
<br />
<br />57 (48,49,50,51,55,56). Mouth
<br />a. terminal (above bottom-of-eye level)
<br />(Fig. 87) ................. X. lexanus
<br />b. low terminal (at or below bottom-of-eye
<br />level) to slightly subterminal (mouth,
<br />including upper lip, not the most
<br />anterior portion of snout) (Fig. 89) . . . . 74
<br />c. distinctly subterminal (mouth notably
<br />posterior to most anterior portion of
<br />snout) (Fig. 61) ........... C. latipinnis
<br />
<br />58 (32). Ventral midline from shortly behind
<br />heart region to near vent with
<br />a. ~1 melanophores in a continuous or
<br />discontinuous line or narrow band (Fig.
<br />32) .................. C. commersoni
<br />b. 7-20 melanophores (Fig. 17) . . . . . . . . . 61
<br />c. ::56 melanophores (Figs. 19, 60, 89) .... 62
<br />
<br />59 (25). Ventral midline from shortly behind
<br />heart region to near vent with
<br />a. ~1 melanophores in a continuous or
<br />discontinuous line or narrow band (Fig.
<br />32) .................. C. commersoni
<br />b. ::s;2Q melanophores (Figs. 17, 19, 60) ... 61
<br />
<br />60 (23,30). Ventral midline from shortly behind
<br />heart region to near vent with
<br />a. 7-20 melanophores (Fig. 17) .. . . . . . . . 61
<br />b. ::56 melanophores (Figs. 19, 60, 89) .... 62
<br />
<br />61 (21,58,59,60). Number of principal dorsal rm
<br />rays
<br />
<br />a. 10 ...................... C. ardens
<br />b. 11-14 . . . . . . . . . . . . . . . . . . . . . . . . . . 63
<br />
<br />62 (58,60). Number of principal dorsal rm rays
<br />
<br />a. 10 ...................... C. ardens
<br />
<br />b. 11 ........................... 63
<br />c. 12-14.......................... 65
<br />d. 15-16.................... X. texanus
<br />
<br />63 (60,61,62). Lateral surface of body above
<br />horizontal myosepta (or lateral
<br />midline), exclusive of melanophores
<br />associated with horizontal myosepta,
<br />
<br />air bladder, visceral cavity (peri-
<br />toneum), or gut,
<br />a. with 1-5 melanophores . . . . . . C. /atipinnis
<br />b. with ~6 melanophores (Figs. 18, 60) ... 64
<br />
<br />64 (63). Lateral surface of body below hori-
<br />zontal myosepta (or lateral midline),
<br />exclusive of melanophores asso-
<br />ciated with horizontal myosepta, air
<br />bladder, visceral cavity (peri-
<br />toneum), or gut,
<br />a. unpigmented (Figs. 59) . . . . . . C. latipinnis
<br />b. with ~1 melanophores (Figs. 18, 60) .. 138
<br />
<br />65 (62). Lateral surface of body above hori-
<br />zontal myosepta (or lateral midline),
<br />exclusive of melanophores asso-
<br />ciated with horizontal myosepta, air
<br />bladder, visceral cavity (peri-
<br />toneum), or gut,
<br />a. unpigmented (Fig. 88) ....... X. texanus
<br />b. with 1-5 melanophores . . . . . .. . . . . . . 91
<br />c. with ~ melanophores (Figs,. 18, 60,
<br />
<br />89) . . . . . . . . . . . . . . . . . . . . . . . . . . 66
<br />
<br />66 (65). Lateral surface of body below hori-
<br />zontal myosepta (or lateral midline),
<br />exclusive of meIanophores asso-
<br />ciated with horizontal myosepta, air
<br />bladder, visceral cavity (peri-
<br />toneum), or gut,
<br />a. unpigmented (Fig. 88) ............. 91
<br />b. with 1-5 melanophores (Fig. 89) ...... 90
<br />c. with ~6 melanophores (Figs. 18, 60) .. 138
<br />
<br />67 (3,5,16,36). Ventral midline from shortly
<br />behind heart region to near vent
<br />with
<br />a. ~1 melanophores in a continuous or
<br />discontinuous line or narrow band (Fig.
<br />32) . . . . . . . . . . . . . . . . . C. commersoni
<br />b. 7-20 melanophores (Fig. 17) . . . . C. ardens
<br />c. ::56 melanophores (Figs. 19, 89) . . . . . . . 69
<br />
<br />68 (23,34). Ventral midline from shortly behind
<br />heart region to near vent with
<br />a. 7-20 melanophores (Fig. 17) .. . . C. ardens
<br />b. ::56 melanophores (Figs. 19, 89) . . . . . . . 69
<br />
<br />69 (67,68). Number of principal dorsal rm rays
<br />a. 10-11..................... C. ardens
<br />
<br />b. 12-14.......................... 70
<br />c. 15-16.................... X. lexanus
<br />
<br />70 (69). Lateral surface of body above hori-
<br />zontal myosepta (or lateral midline),
<br />exclusive of melanophores ass0-
<br />ciated with horizontal myosepta, air
<br />bladder, visceral cavity (peri-
<br />toneum), or gut,
<br />a. with::s;S meIanophores (Fig. 88) X. lexanus
<br />b. with ~6 meIanophores (Figs. 19, 89) ... 71
<br />
<br />71(70). Lateral surface of body below
<br />horizontal myosepta (or lateral
<br />
<br />77
<br />
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