DE, A. GUXTHEE OX GIGAXTIC LAXD-TOETOISES. 
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PLATE 39. 
Lower views of the natural size of the skulls of : — 
Fig. A. Testudo elephantopus. 
Fig. B. Testudo microphyes. 
Fig. C. Testudo ephippium. 
Fig. D. Testudo nigrita. 
а, c, d , e as in Plates 37 & 38. 
б. Hollow in front of occipital condyle. 
f. Outer pterygoid edge. 
PLATE 40. 
Fig. A. Upper and lateral views of the atlas of Testudo elephantopus. 
a. Centrum. 
Fig. B. Upper and lateral views of the atlas of Testudo vicina (centrum lost). 
Fig. C. Three views of the fifth cervical vertebra of Testudo elephantopus. 
Fig. D. Three views of the sixth cervical vertebra of Testudo elephantopus. 
All the figures are of the natural size. 
PLATE 41. 
Fig. A. Tympanic region of Testudo vicina. 
e. Xotch for the passage of the Eustachian tube. 
Fig. B. Three views of the seventh cervical vertebra of Testudo elephant opus, 
a. Summit of neural crest. 
h. Hollow behind the anterior zygapophysis. 
Fig. C. Three views of the seventh cervical vertebra of Testudo vicina. 
a. Bifurcate summit of the neural crest. 
All these figures are of the natural size. 
PLATE 42. 
Fig. A. Front view of the humerus of Testudo elephantopus. 
Fig. A'. Back view of the same. 
Fig. B. Front view of the hwmenis of Testudo ephippium. 
Fig. B'. Back view of the same. 
a. Ulnar tuberosity. 
h. Badial canal for blood-vessels. 
These figures are two thirds of the natural size. 
