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1903 — Heller, Edmund — Papers from the Hopkins Stanford Galapagos Ex- 

 pedition, 1898-1899, XIV, Reptiles, Proceedings Washington Academy 

 of Sciences, V, pp. 48-59. 



1903 — Vaillant, Leon — Les Tortues de terre gigantesques. Revue Scien- 

 tifique, June 6, 1903. Reprint pp. 1-38. 



1903 — Rothschild, Walter — Description of a New Species of Gigantic Laind 

 Tortoise from Indefatigable Island. Novitates Zoologicae, X, p. 119. 



1907 — Van Denburgh, John — Preliminary Descriptions of Four New Races 

 of Gigantic Land Tortoises from the Galapagos Islands. Proceed- 

 ings California Academy of Sciences, (4), I, Dec, 1907, pp. 1-6. 



1908— Kammerer— 5/aff. Aquar.—Terr.—Kunde, XIX, 1908, p. 737, fig. 1-2. 



1909 — Siebenrock, F. — Synopsis der rezenten Schildkroten, mit Beziicksich- 

 tigung der in historischer Zeit ausgestorbenen Arten. Zoolog. Jahrb. 

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