Vol. II, Pt. I] VAN DENBURGH— GALAPAGOS TORTOISES 303 



Testudo becki Rothschild 



North Albemarle Island Tortoise 

 Plates 31 to 38. 



Testudo becki Rothschild, Nov. ZooL, VIII, 1901, p. 372; Van 

 DENBURGH, Proc. Cal. Acad. Sci. (4), I, 1907, p. 4; SiEbenrock, Zool. 

 Jahrb., Suppl. X, 3, 1909, p. 536. 



Testudo hedsi, HEllEr, Proc. Washington Acad. Sci., V, 1903, p. 

 59 (err. typ.). 



Type specimen. — Tring Museum, England. Adult male. 

 Length 40.75 inches. Taken at Cape Berkeley, northern Al- 

 bemarle, by R. H. Beck. 



Distribution. — This tortoise seems to be confined to the 

 northern end of Albemarle Island, where it has been taken 

 near Bank's Bay and Cape Berkeley. 



Material. — The Academy collection contains seven speci- 

 mens, of which one is an adult female. The Tring Museum 

 contains five adult males collected by Mr. Beck. 



Diagnosis. — No nuchal; gulars paired; fourth cervical ver- 

 tebra biconvex; front of carapace high, in males sometimes 

 higher than middle ; height at nuchal notch not less than AA%, 

 (44 to 52%) of straight length; difference between percent- 

 ages of front and middle heights less than 9 ( — 6 to -|-6) ; 

 carapace saddle-shaped, narrow anteriorly, width at margin 

 of junction of second and third marginals not more than 54% 

 (40 to 54%) ; first marginals not very greatly enlarged, not 

 greatly everted, their ventral surfaces not vertical, their most 

 prominent points separated by less than 30% (23 to 29%); 

 length over curve not more than 123% (114 to 121%), 

 greater than width over curve (except in one specimen) ; 

 vertical distance from lower surface of plastron to lower edge 

 of lateral marginals small — 5 to 8% in males, 9% in female; 

 general size large, straight length 34 to 41.5 inches; plastron 

 of moderate length, 73 to 84%; plates nearly smooth in 

 adults; pectorals forming a suture on median line; eighth 

 marginal plate not reduced; lower jaw and throat of males 

 marked with yellow. 



September 30, 1914. 



