52 SERRATED TORTOISE. 



inspected, with minute, confluent, dusky specks. 

 The disk consists, as usual, of thirteen pieces or 

 scutella, rather broad, those of the lower part 

 having a gradual inclination to a sharpened form, 

 which in the three lowermost is complete: down 

 the back runs an uncommonly distinct carina, ex- 

 tending uniformly through every middle scutel- 

 lum, and having a breadth of about the tenth of an 

 inch, and a flat surface : down each of the lateral 

 rows of scutella also runs a very distinctly marked 

 carina, but far less conspicuous than the former, 

 and with an acute instead of flattened surface ; 

 but the principal character of the species consists 

 in the acute projections of the five lowermost mar- 

 ginal pieces on each side, forming a very strongly 

 and deeply serrated outline on that part of the 

 shell. All the scutella in this species, but espe- 

 cially the pointed lower ones, are somewhat im- 

 bricated, so as to lap over each other. The colour 

 of the under shell is blackish, with yellowish mar- 

 gins. This shell is in the Leverian Museum. 



