Fig. 5. Regional variation in number of dorsal scale rows. Scale-row reduction occurs at mid-body, approximately at the level of the pylorus. Data on scale rows were collected from 108 skin samples obtained from 12 specimens. Values in parentheses indicate the number of samples included for regions in which all 12 samples were not used. Two skin samples (one each for regions e and f) in transitional states of scale-row reduction were excluded from this data set. The location of the pylorus, between regions e and f, is indicated by a broken line.