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McELROY AND DOUGLAS-MORPHOLOGICAL VARIATION IN GILA 649 <br />APPENDIX. CONTINUED. <br />j <br />Landmark Acronym Type Description <br />Fork Fk A Anteriormost point of trailing edge of caudal <br />fin <br />Tip of anal TA" A Distal end of first anal-fin ray <br />1/ (ODo-vPe) H Geometric point 1/ of way along dorsal con- <br />1/2 (ODo-vPe) <br />3/ (ODo-vPe) <br />'/2 (vPe-Na) <br />'/2 (Na-VPu) <br />'/2 (vPu-Sn) <br />'/2 (VPd-Dpd) <br />A = Anatomical landmark; H = Helping point. <br />"These acronyms do not appear in Douglas (1999). <br />tour of body from ODo to vPe at presumed <br /> midsagittal line <br />H Geometric point '/2 of way along dorsal con- <br /> tour of body from Odo to vPe at presumed <br /> midsagittal line <br />H Geometric point 3/4 of way along dorsal con- <br /> tour of body from Odo to vPe at presumed <br /> midsagittal line <br />H Geometric point 1/2 of way along dorsal con- <br /> tour of body from vPe to Na at presumed <br /> midsagittal line <br />H Geometric point '/2 of way along dorsal con- <br /> tour of body from Na to vPu at presumed <br /> midsagittal line <br />H Geometric point '/2 of way along dorsal con- <br /> tour of body from vPu to Sn at presumed <br /> midsagittal line <br />H Geometric point halfway along line connect- <br /> ing VPd and DPd <br />r