. Bulletin. Science; Natural history; Natural history. 76 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 2. Mensural and meristic features used for the morphological analysis oiThamnophis elegans terrestris and T. couchii atratus. a. Dorsal view of head; b. Ventral view of head; c. Lateral view of head; d. Dorsal view of flattened body skin. (Numerals refer to features described in Table 1.) membrane during the staining process. The migration distance of the transferrin band from the appHcation site was measured to the nearest tenth of a milhmeter. The distance of migration of the albumin band
. Bulletin. Science; Natural history; Natural history. 76 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 2. Mensural and meristic features used for the morphological analysis oiThamnophis elegans terrestris and T. couchii atratus. a. Dorsal view of head; b. Ventral view of head; c. Lateral view of head; d. Dorsal view of flattened body skin. (Numerals refer to features described in Table 1.) membrane during the staining process. The migration distance of the transferrin band from the appHcation site was measured to the nearest tenth of a milhmeter. The distance of migration of the albumin band was also measured. As the latter distance was identical in both species, it was used to standardize different runs. Results were expressed in terms of transferrin migration distance as a percent of albumin migration distance ("percentage of migration"). A total of 22 mensural and meristic features were studied on the specimens sampled (Fig. 2). Measurements were taken with a divider, then transferred to Vernier calipers and recorded to the nearest tenth of a millimeter. All linear measurements were paired and handled as ratios to eliminate the problem of comparing snakes of various sizes (Table 1). The mensural and meristic data, describing 14 characters, were separated into two groups (^'terrestris'' and '"at- ratus") based on the electrophoretic data. These morphological data were evalu- ated in a stepwise discriminant analysis program (BMD07M; Dixon, 1970). The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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