. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. GANS AND ALEXANDER : ANTILLEAN AMPHISBAENIDS 99 generally of normal size though the postparietals may be en- larged. Approximately 10 per cent of the specimens have a fourth dorsal half-annulus between the second and third, and another 20 per cent show a few, often asymmetric supplementary segments in the nuchal region. The anterior edge of the third body annulus lies in a plane normal to the long axis of the Fig. 14. A. c. cubana. Ventral view of cloacal region and tail of MCZ 10790 from Soledad, Cuba. The l
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. GANS AND ALEXANDER : ANTILLEAN AMPHISBAENIDS 99 generally of normal size though the postparietals may be en- larged. Approximately 10 per cent of the specimens have a fourth dorsal half-annulus between the second and third, and another 20 per cent show a few, often asymmetric supplementary segments in the nuchal region. The anterior edge of the third body annulus lies in a plane normal to the long axis of the Fig. 14. A. c. cubana. Ventral view of cloacal region and tail of MCZ 10790 from Soledad, Cuba. The line equals 1 mm to scale. (M. Franson, del.) The chin is characterized by an elongate tear-drop shaped postmental flanked posteriorly by a pair of large tear-drop shaped segments of the first postgenial row. One or more extremely elongate segments fill the narrow gap between the enlarged post- genials. These tiny and irregular segments may or may not be in contact with the postmental and often break crossways into two or more segments. The fourth and fifth body annuli are narrower, mark the end of the bulging temporal musculature and appear to correspond to the position of the atlas. General observations: The skull has been figured and discussed by Zangerl (1944) and Kesteven (1957). Girdle remnants and vertebrae were commented on by Zangerl (1945). The thyroid was studied by Lynn and Komorowski (1957). Range: Isla de Pinos; Central and eastern Cuba from Cien- fuegos to Oriente. Locality records (see Fig. 2 for map): ISLA DE PINOS: Jacksonville MCZ 46235. CUBA: (Barbour, 1930, 1935, 1937; Boulenger, 1885; Gundlach, 1880; Peters, 1878; Stejneger, 1904; Strauch, 1881); AMNH 58839; HM 367 A—B; MHNP. 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, M
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