1869.] DR. J. E. GRAY ON THE 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. Nicorta. 
NIcoRIA 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 ? The toes enclosed in the 
skin to the claws, covered with band-like shields. 
5. Rainociemmys, Fitz. 
This genus may be divided thus :— 
* The sternum flat longitudinally, and very slightly elevated at the 
sides under the sterno-costal symphyses. 
1. 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 Mu- 
seum. 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 con- 
cavity 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, pro- 
duced, 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 
