REPTILES 



57 



In one specimen seen the coloration varied from the customary 

 blackish in having the rostral, mandible, and angles of the jaw yellow- 

 ish as in T. ephifpium. 



Our material consists of the shells and skulls of four large males 

 taken east of Tagus Cove. 



The skulls differ from those of T. vicina as follows: 



1. Tympanic cavity not armed posteriorly by a prominent process, 

 the Eustachian notch shallow. 



2. Occipital condyle small with a more or less definite recess ante- 

 riorly (in one specimen the recess is as deep as in T. nigrita). 



3. Pterygoid edges less flattened (in one specimen they are sharp). 

 The skulls differ from those of T. ephippiu7n of Duncan Island in 



the characters of the pterygoid edges and the recess before the con- 

 dyle much as T. vicina does but the Eustachian notch is similar. 

 Comparison of these skulls seems to show that some of the characters 

 upon which herpetologists have placed specific value are subject to 

 considerable individual variation. Skull No. 4800 Stanford Museum 

 in the characters of the occipital recess and the pterygoid edges is a 

 perfect facsimile of the skull figured by Giinther as T. elephantopus. 



MEASUREMENTS OF Tcstudo niicrop/iyes. ADULT MALES. 



Cat. No. Stan. Univ. Mus. 



Carapace, length 



" " over curve 



" width 



" " posteriori}' at 8th mar 

 ginal plate 



" height at nuchal notch 



" " median 



Gular plate to nuchal notch 



Anal plate to last marginal 



Plastron, length 



" " bridge 



" width 



" concavity 



4799 



Centim. 

 96 



% 



114 

 69 



70 



35 

 46 

 32 



19 

 70 

 40 

 66 

 15 



480s 



Centim. 



99-5 



% 



114 

 67 



67 

 37 

 43 

 32 

 17 

 70 



38 

 62 

 15 



4800 



Centim. 



94 

 % 

 III 



71 



71 

 40 



47 

 32 

 17 

 71 

 40 

 66 

 15 



4806 



Centim. 



90 



% 



119 



77 

 77 



75 

 42 

 66 

 15 



TESTUDO EPHIPPIUM Giinther. 



Testudo ephippium Gunth., Phil. Trans., clxv, p. 271, 1875 ; Gig. Land 

 Tort., p. 81, pis. XXXIX, XLii-XLiv, 1877 ; Novit. Zool., ill, p. 329, 

 pis. xx-xxii, 1896.— BouL., Cat. Chel. Brit. Mus., p. 171, 1889. 



Teshido abingdonii Baxjk, Am. Nat., xxiii, p. 1039, 1889 (part). 



Ra7ige. — Duncan Island. {Albatross^ 1S8S and 1891 ; Rothschild 

 Exped. ; Hopkins Stanford Expedition). 



