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<br />limb of loop completely across ventral <br />midline (gut phase 3) or with at least one <br />limb of loop fully across ventral midline but <br />not yet with both limbs across fully to <br />opposite side (gut phase 4) .... C. discobo/us <br /> <br />112 (111). Pigmentation of peritoneum <br />a. absent on lateral and ventro-Iateral <br />surfaces (Figs. 17, 59, 87) .......... 113 <br />b. at least sparse or patchy on lateral <br />surfaces only (Fig. 18) ............ 115 <br /> <br />113 (112). Principal dorsal fm rays <br />a. present (at least one) but full comple- <br />ment incomplete or unclearly formed . 154 <br />b. present with full (adult) complement <br />clearly formed and countable (principal <br />fm rays are sufficiently formed when the <br />last principal ray, which consists of two <br />separate ray elements or "branches" <br />based on the most posterior pterygia- <br />phore, is well defmed) ............ 175 <br /> <br />114 (101). Gut (Fig. 5) <br />a. essentially straight or with bend less than <br />900 (gut phase 1) or with at least 90" <br />bend or partial s-shaped loop (gut phase <br /> <br />2) .. . . . . . . . . . . . . . . . . . . . . . . .. 115 <br />b. with full loop (s-shape to near anterior <br />end of visceral cavity) but with neither <br />limb of loop completely across ventral <br />midline (gut phase 3) or with at least <br />one limb of loop fully across ventral <br />midline but not yet with both limbs <br />across fully to opposite side (gut phase <br />4) ............... . . . . C. discobo/us <br /> <br />115 (112,114). Principal dorsal fm rays <br />a. present (at least one) but full comple- <br />ment incomplete or unclearly formed <br /> <br />. .. .. . .. .. .. .. .. .. .. . X. texanus <br />b. present with full (adult) complement <br />clearly formed and countable (principal <br />fm rays are sufficiently formed when the <br />last principal ray, which consists of two <br />separate ray elements or "branches" <br />based on the most posterior pterygio- <br />phore, is well defmed) ............ 183 <br /> <br />116 (6,52). Full complement of dorsal fm ptery- <br />giophores (same number as adult <br />complement of principal dorsal fm <br />rays which develop subsequent to <br />the pterygiophores) <br />a. incompletely or unclearly formed .... 185 <br />b. clearly formed and countable ....... 117 <br /> <br />117 (116). Number of dorsal fm pterygiophores <br />a. 9 . . . . . . . . . . . . . . . . . . . C. discobo/us <br /> <br />b. 10-12......................... 118 <br />c. 13 .................. C. commersoni <br /> <br />118 (117). Length of base of dorsal fm (origin <br />to insertion of dorsal fm) <br />a. 11 % SL . . . . . . . . . . . . . . . . C. discobo/us <br />b. 12-14% SL . . . . . . . . . . . . . . . . . . . .. 185 <br /> <br />119 (14,86,107). Full complement of dorsal fm <br />pterygiophores (same number as <br />adult complement of principal <br />dorsal fm rays which develop <br />subsequent to the pterygiophores) <br />a. incompletely or unci early formed .... 187 <br />b. clearly formed and countable ....... 120 <br /> <br />120 (119). Number of dorsal fm pterygiophores <br />a. 9 . . . . . . . . . . . . . . . . C. p/atyrhynchus <br /> <br />b. 10-12......................... 121 <br />c. 13 . . . . . . . . . . . . . . . . . C. commersoni <br /> <br />121 (120). Length of base of dorsal fm (origin <br />to insertion of dorsal fm) <br />a. 11% SL . . . . . . . . . . . . . . C. p/atyrhynchus <br />b. 12-13% SL .................... 187 <br />c. 14% SL . . . . . . . . . . . . . . . C. commersoni <br /> <br />122 (18,34). Full complement of dorsal fm ptery- <br />giophores (same number as adult <br />complement of principal dorsal frn <br />rays which develop subsequent to <br />the pterygiophores) <br />a. incompletely or unclearly formed .... 189 <br />b. clearly formed and countable ....... 123 <br /> <br />123 (122). Number of dorsal fin pterygiophores <br /> <br />a. 9 . . . . . . . . . . . . . . . . . . . . . . . .. 126 <br /> <br />b. 10-12......................... 124 <br />c.13 .................c.commersoni <br /> <br />124 (123). Length of base of dorsal fm (origin <br />to insertion of dorsal fm) <br />a. 11% SL . . . . . . . . . . . . . . . . . . . . . .. 191 <br />b. 12-13% SL .................... 189 <br />c. 14% SL . . . . . . . . . . . . . . . . . . . . . " 185 <br /> <br />125 (19,53). Full complement of dorsal fm ptery- <br />giophores (same number as adult <br />complement of principal dorsal fm <br />rays which develop subsequent to <br />the pterygiophores) <br />a. incompletely or unclearly formed .... 191 <br />b. clearly formed and countable ....... 126 <br /> <br />126 (123,125). Length of base of dorsal fm <br />(origin to insertion of dorsal fm) <br />a. 11-13% SL .................... 191 <br />b. 14% SL . . . . . . . . . . . . . . . . C. discobo/us <br /> <br />127 (41,79). Full complement of dorsal fm ptery- <br />giophores (same number as adult <br />complement of principal dorsal fm <br />rays which develop subsequent to <br />the pterygiophores) <br />a. incompletely or unclearly formed .... 197 <br />b. clearly formed and countable ....... 128 <br /> <br />128 (127). Number of dorsal fm pterygiophores <br />a. 9 . . . . . . . . . . . . . . . . . . C. discobolus <br /> <br />b. 10-11 . . . . . . . . . . . . . . . . . . . . . . . .. 148 <br />c.12 ......................... 129 <br /> <br />d. 13-14......................... 132 <br />e. 15-16.................... X. texanus <br /> <br />63 <br />