Elaphe carinata carinata
Large snake; total length up to 240 cm. There are 17-25 (21-25 at mid-body) rows of scales, which are heavily keeled except for those in the first or second rows. Head is elongate, slightly triangular; body is moderately heavy or stout; tail is long. Eye is large; iris is light brown to rusty brown, dappled with very fine flecks of dark brown and pupil is round to vertically oval, jet black, surrounded by ring of golden orange. Tongue is flesh-colored to red, with stem usually red and fork tips dark gray to black. Upper head is olive gray to olive brown, and its dorsal shields are distinct due to black pigment in sutures or along margins. Upper body is olive yellow to olive brown, and most scales are distinct due to black pigment on margins; some individuals are uniforms in color, however, others possess ill-defined cross markings on back or ill-defined bands due to combination of scales with black margins and areas with black skin between scales, and in other areas white skin may show between scales. Posterior half of upper body and all upper tail are more uniform in appearance. Ventral head is white to cream; lower labials are usually well marked with black pigment on anterior margins. Ventral neck is cream white to light gray, and pigmentation of irregular size and shape is progressively greater and more intensive toward mid and posterior part of ventral body while spots on outer quarter or third of the ventrals tend to form broken longitudinal lines. Anal scale is divided and subcaudals are paired. In the young the head may be less distinctly marked than in adults. There is a minimum of black pigment along sutures of head shields and the body scales may lack the black margins so characteristic to adults. Some young individuals have dark cross bands anteriorly along the vertebral line, and one or two light brown longitudinal stripes on sides of body and extending onto tail while the ventrals may have little or no pigment.