. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 2. Head crests of adult male Basiliscus. Top left: typical B. basiliscus. Bottom right: typical B. barbouri. Top right and bottom left: intermediate variants occurring in both Panama and Colombia. 2). Dorsal crest. This is also an adult male character, pres- ent in four of the five forms: vittatus, plumifrons, basiliscus and barbouri. It is not present in galeritus, where it is replaced by a periodic pattern in a row of large triangular scales separated at regular intervals by two to four small intervening scal
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 2. Head crests of adult male Basiliscus. Top left: typical B. basiliscus. Bottom right: typical B. barbouri. Top right and bottom left: intermediate variants occurring in both Panama and Colombia. 2). Dorsal crest. This is also an adult male character, pres- ent in four of the five forms: vittatus, plumifrons, basiliscus and barbouri. It is not present in galeritus, where it is replaced by a periodic pattern in a row of large triangular scales separated at regular intervals by two to four small intervening scales (Fig. 3). This replacement of the dorsal crest by a distinctive pattern of scalation appearing in both sexes and in juveniles as well is a constant character in galeritus. In the other groups, females and young individuals do not have a dorsal crest nor does their middorsal row of scales resemble that of galeritus since there is not the same striking variation in size of the scales nor the same well-defined periodicity (Fig. 3).. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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