. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 212 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5. Figure 9. Sibynomorphus oneilli. Dorsal and ventral views of KU 212599 (from near Cajabamba, Cajamarca Department, Peru). Female, 374 mm total length. The largest male is 571 mm total length (440 mm SVL). Body somewhat com- pressed. Tail 22—26% of total length in males, 20-22% of total length in females. Dorsal scales smooth and in 15—15—15 rows in all specimens except the holotype, in which there is a posterior reduction to 13 scale rows (see above
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 212 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5. Figure 9. Sibynomorphus oneilli. Dorsal and ventral views of KU 212599 (from near Cajabamba, Cajamarca Department, Peru). Female, 374 mm total length. The largest male is 571 mm total length (440 mm SVL). Body somewhat com- pressed. Tail 22—26% of total length in males, 20-22% of total length in females. Dorsal scales smooth and in 15—15—15 rows in all specimens except the holotype, in which there is a posterior reduction to 13 scale rows (see above Redescription of the Holotype). Vertebral row slightly broader than paravertebral rows. Ventrals 152—168 (averaging 161) in males, 163— 173 (averaging 167) in females; 0—4 pre- ventrals precede the ventral plates. Anal single. Subcaudals 62—77 (averaging 68) in males, 57—64 (averaging 61) in females. Usually, a loreal and a single preocular (superior to the loreal) border the anterior edge of the eye, but the preocular is often fused with the prefrontal (Table 1); loreal squarish or polygonal. The holotype has two preoculars on each side and the loreal is separated from the eye (interposed be- tween the inferior preocular and the pos- terior nasal). MUSM 3376 has a separate preocular but, in addition, the loreal is di- vided vertically and horizontally to form a pair of lower preoculars, thus resulting in three preoculars. Postoculars are virtually always 2 (3 on one side of one specimen). Primary temporals usually 2 (occasionally 1); secondary temporals usually 3 (range 1—4), tertiary temporals usually 3 or 4 (rarely 2). Supralabials 6—10 with the most frequent patterns 8 (4-5 bordering eye) or 7 (3-4 bordering eye). Infralabials 9-13 (most frequently 10 or 11). One pair of infralabials in contact behind mental in all specimens. Chin shields in 2 pairs (N = 3), 3 pairs (N = 10), pairs (N = 1), or 4 pairs (N = 4). Maxillary teeth 13-16 (N — 13). The p
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