172 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Habits. — Barrington Island, Oct. 20, 1905. Went ashore 

 on the N.E. coast, and traveled about a mile to the iguana 

 colony. Tropidiiri were common near the beach, but plentiful 

 inland. July 9, 1906. Tropiduri seem to be less abundant 

 now than at the time of our former visit. July 10. Lizards 

 are fairly abundant and rather wild. 



''All stomachs examined contained insects, chiefly Orthop- 

 tera." (Heller.) 



Tropidurus albemarlensis Baur 

 Galapagos Lizard 



? 1851, Holotropis grayi, Dumeril^ Cat. Meth, Rept., 1851, p. 70 (part) ; 

 DuMERiL, Arch, d' Mus., VIII, p. 538 (part). 



1871, Craniopeltis grayii, Peters, Mon. Berlin. Acad., 1871, p. 645 

 (part). 



1876, Tropidurus {Craniopeltis) grayii, Steindachner, Festschr. 

 Zool.-Bot. Ges. Wien, 1876, p. 310, pi. II, fig. 1 (part). 



1877, Liocephalus grayi, Gunther, Proc. Zool. Soc. Lond., 1877, p. 

 67 (part). 



1885, Tropidurus grayi, Boulenger, Cat. Lizards, II, 1885, p. 172 

 (part) ; Cope, Proc. U. S. Nat. Mus., XH, 1889, p. 145 (part) ; Boulenger, 

 Ann. and Mag. Nat. Hist, (6), VII, 1891, p. 502 (part). 



1890, Tropidurus albemarlensis, Baur, Biol. Centralbl., X, p. 478; Baur, 

 Festschrift fiir Leuckart, 1892, pp. 265, 269 (type locality, Tagfus Cove, 

 Albemarle Island, Galapagos Archipelago). 



1890, Tropidurus indefatigabilis, Baur, Biol. Centralbl., X, p. 478 ; Baur, 

 Festschrift fiir Leuckart, 1892, pp. 265, 268 (type locality, Indefatigable 

 Island, Galapagos Archipelago). 



1892, Tropidurus jacobii, Baur, Festschrift fiir Leuckart 1892, p. 269 

 (type locality James Island, Galapagos Archipelago). 



1903, Tropidurus grayi grayi. Heller, Proc. Washington Acad. Sci., V, 

 1903, p. 69 (part). 



1903, Tropidurus grayi magnus. Heller, Proc. Washington Acad. Sci., 

 V, 1903, p. 74 (type locality Narborough Island, Galapagos Archi- 

 pelago). 



Diagnosis. — Sides of neck granular, with numerous folds; 

 hind legs of males without definite dark spots; interparietal 

 plate usually much broader than long ; not more than 76 scales 

 around middle of body; scales larger than in T. albemarlensis 

 barringtonensis, 50 to 69 around middle of body. 



Types. — Dr. Baur described T. albemarlensis from eleven 

 specimens collected by the naturalists of the "Albatross" at 

 Tagus Cove, Albemarle Island, in April, 1888. These lizards 

 are Nos. 15003 to 15013 of the U. S. National Museum col- 

 lection. T. indefatigabilis was described from ten examples 

 from Indefatigable Island. T. jacobii was based upon a con- 

 siderable number of specimens from James and Jervis islands. 

 The type of Heller's T, grayi magnus was collected on Nar- 



