Vol. II, Pt. I] VAN DENBURGH— GALAPAGOS TORTOISES 



295 



eee. — Marginal border not scalloped; first marginals with- 

 out prominent points; height to marginals low, 3 co 

 8%; the sum of the curved length, middle height, 

 difference between front and middle heights, and 

 height to marginals is less than twice the straight 

 length. Southeastern Albermarle. 



T, giintheri. — p. 335. 



eee^.— Marginal border scalloped; first marginals with 

 more or less prominent points; height to marginals 

 greater, 6 to 10% ; the sum of the curved length, mid- 

 dle height, difference between front and middle 

 heights, _ and height to marginals usually is more 

 than twice the straight length. 



ff. — Width over curve greater, usually greater than 

 length over curve. South Albemarle. 

 T. vicina. — p. 344. 



ff-. — Width over curve less, not equal to length over 

 curve. Jervis Island. 



T. wallacei. — p, 351. 



Descriptions of the Races 



In the following pages each race or species of Galapagoan 

 tortoise is treated separately. Since these tortoises are structur- 

 ally so nearly identical, and differ chiefly in shape and pro- 

 portions, it has been thought best to omit long descriptions of 

 each race. Instead, brief diagnoses are given, and it is hoped 

 that the numerous photographs of specimens, together with 

 the tables of measurements, will convey a more accurate and 

 comprehensive knowledge of these tortoises than any descrip- 

 tions could. 



The field notes were made by Mr. Slevin. 



