| OCR Text |
Show 1869.] DR. j. E. GRAY O N T H E TORTOISES. 189 4. GEOCLEMMYS CALLOCEPHALUS, Gray, P. Z. S. 1863, p. 254. The upper beak with an acute central notch ; the alveolar surface linear, with a submarginal ridge on the upper, and a narrow groove in the lower jaw. 4. NICORIA. NlCORIA SPENGLERI. Skull (as seen through the skin in the stuffed specimen) narrow, rather acute in front, flat on the sides; orbit very large, lateral; zygomatic arch broad, flat, as wide as the back edge of the orbit, as wide behind as the rather small tympanic cavity ; lower jaw rather weak, with a large inferior space, rather rounded in front. The sheath of the upper jaw is strongly and acutely hooked at the tip, and entire on the edge. Palate 1 The toes enclosed in the skin to the claws, covered with band-like shields. 5. RHINOCLEMMYS, Fitz. This genus may be divided thus :- * The sternum flat longitudinally, and very slightly elevated at the sides under the sterno-costal symphyses. I. RHINOCLEMMYS ANNULATA. ** The sternum slightly arched longitudinally, and much elevated at the sides under the sterno-costal symphyses. 2. RHINOCLEMMYS SCABRA. Crown flat, with a spot before each eye, and an oblong band on the crown, over back part of orbits. Skeleton in the British Museum received from the Utrecht Museum. Skull elongate, rather solid; nose erect, shelving beneath; crown rather convex ; orbit large, circular, lateral; sides of the face nearly erect; zygomatic arch very broad, forming part of the temple above, slightly convex on sides; mastoid bone rather elongate; edge of upper beak straight, with a slight central notch. Palate flat; internal nostrils anterior, with a short, rather deep oblong concavity behind each, separated by a strong central ridge. Alveolar surface narrow, linear, with a slight sunken groove, edged internally by a slightly raised sharp edge. Lower jaw wider; upper surface slightly prominent in front, with a sharp edge having a slightly concave linear depression on the inner side. Toes short, strong. Specimen in spirit in the British Museum. Skull ovate rhombic, rather elongate, sides of the face flat, erect; nose short; orbit large, subsuperior, on the outer edge of the crown ; crown rhombic, produced, and acute behind; rather longer from the hinder edge to the hinder edge of the orbit than from that part to the end of the nose ; zygomatic arch thin, flat, dilated, forming part of the crown in front, narrow and only attached to the upper front part of the small sub-trigonal tympanic cavity ; upper jaw with a narrow double edge, the edges parallel and separated by a rather deep narrow groove; lower |
