| OCR Text |
Show 196 DR. J. E. GRAY ON THE TORTOISES. [Mill*. 1 I . 14. GLYPTEMYS. GLYPTEMYS PULCHELLA, Agassiz. Geoclemys pulchella, Gray, Cat. Shield Rept. p. 18. The skeleton of a large specimen which had been in confinement, with the bones separate, in the British Museum, prepared by Dr. Giinther. The skull with a broad, very flat forehead, and high, square nose; the latter granular, the lower half sunk in a deep wide notch in the upper edge of the upper beak. Upper beak high, with an acute central notch. Lower jaw strong, thick and convex in front. Zygomatic arch strong, convex. Orbit large, quite lateral, with a narrow lower hinder edge. Palate concave in front, flat behind ; internal nostrils large, anterior. The alveolar surface of the upper jaw rather broad, smooth, with a slight concavity in front; of the lower jaw broad in front, narrower on the sides, regularly concave. The broad front of the alveolar surface of the lower jaw separates these animals from the genus Geoclemmys ; and therefore I have adopted Agassiz's generic name. Fig. 9. Glyptemys pulchella. A large specimen in spirit in the British Museum. Skull rather thin, ovate rhombic, sides flat; orbit very large, subsuperior, in the upper margin of the crown ; crown rhomboid, produced into an acute point behind, the hinder end as far from the hinder edge of the orbit as that part is from the end of tbe nose; zygomatic arch short, broad, rather broader in front than the back edge of the orbit, |
