THE GALAPAGOS TORTOISES. 



2s:; 



distinct striae. From the fourth vertebral to the caudal there is a moderately 

 sharp descent but the first of these scales has not a marked boss. The lines of 

 junction between marginals and costals are moderately straight. The caudal 

 does not extend as far backward as the marginal at either side of it, but curves 

 downward somewhat lower. 



The sternum is broad; the abdominals make a long bend from their lowest 

 portion to meet the marginals. The anals form a shallower notch than that of 

 T. vidua; their hinder angles are more rounded off. The sternal concavity 

 is shallow, not yet reaching the depth of half an inch in the hind parts of the 

 abdominals. A deep groove near the edges of the scutes (stria of growth) 

 shows that the abdominals have made a greater enlargement than the other 

 scales (Plate 19, fig. 3). 



Measurements. 



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This tortoise (Type M. C. Z. 11075) is described from a bony carapace 

 and plastron on which there are seven or eight entire scutes in place. Of its 

 history nothing definite is known. It was supposed to have come from the 

 Mascarenes. Possibly a name and date, "Narraga 1861," may yet help to 



1 Giinther, Philos. trans., 1875, 165. 



2 Van Denburgh, Proc. Cal. acad. sci., 1907, 1. 





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