. Relazione annuale del consiglio di amministrazione di Regents dello Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archivi; scoperte nel campo della scienza. 644 RELAZIONE OP MUSEO NAZIONALE, 1889. Nella semplicità delle Mascarene tartarughe tbis non è così singolare, come Maurizio, Bourbon e Rodriguez sono ad una certa distanza al di là; ma le tartarughe Galapagos isole abitano la maggior parte dei quali sono in vista di un ' altra, e alcuni separati da soli 8 o 10 miglia di mare. 0* Abingdon Bindloes o torre di 0 Jam.ea Narborotigny ) 0 £-;*^-Jndefa.HGA6le Bamrvgton, C^J Albemarle Chatham Cha"es H^. Mappa 6-la distribuzione

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. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 644 REPORT OP NATIONAL MUSEUM, 1889. In the ease of the Mascarene tortoises tbis is not so singular, as Mauritius, Bourbon, and Rodriguez are some distance apart; but the Galapagos tortoises inhabit islands most of which are in sight of one ' another, and some separated by only 8 or 10 miles of sea. 0* Abingdon Bindloes O 0 Tower Jam.ea Narborotigny ) 0 £—;*^-Jndefa.hga6le Bamrvgton, C^J Albemarle Chatham Cha«es H^. Map 6—The distribution of Galapagos Tortoises. The exception noted above to the rule that a given island possesses but a single species of tortoise, is Albemarle Island, which has two, but in this instance the island is divided by lava streams whose broken ir- regular surfaces present impassible barriers to such creatures as tor- toises. It is unfortunate, in view of the interest attached to the subject, that the exact locality of many of the tortoises brought from the Gala- pagos Islands should be unknown, the more that unless the problem of their distribution is soon settled it never can be. Dr. Gunther enumerates six species, the first two of which are certainly known to have come from the islands assigned to them, two are in a measure conjectural, and two are unknown. Three, probably four, species are in the collection of the U. S. National Museum, but in this case a little uncertainty hangs over the exact locality they came from, owing to the fact that several were obtained at Chatham Island, whither they were brought from other islands of the archipelago. One very large indi- vidual, however, was obtained at Abingdon Island, where the tortoises are probably extinct, the weathered skeleton having fortunately been preserved in a tolerably complete condition. The Galapagos tortoises are vegetable feeders, living largely on succulent cactus, which serves the double purpose of food and driuk.

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• bookcentury1800
• bookdecade1840