ZooL.— Vol. III.] HELLER— GALAPAGOS MAMMALS. 



239 



Measurements of Mus musculus. 



Oryzomys Baird. 



Oryzomys Baird, N. Am. Mamm. 1857, p. 458. 

 Tyfe, Mus -palustris Harlan. 



Range. — ^Southeastern United States from New Jersey 

 south through Mexico, West Indies, and Central and South 

 America to Patagonia. Galapagos Archipelago (two 

 peculiar species). 



Oryzomys galapagoensis (Water house). 



Mus. galapagoensis Waterh, Zool. Voy. Beagle, Mamm. 1839, p. 65. 



Range. — Chatham Island (Darwin). 



This species has not been collected since Darwin took 

 the types in 1835. It is now probably extinct or else 

 restricted to the barren eastern part of the island where 

 Darwin secured his specimens. 



Measurements^ of the type (dried skin): Total length 

 272, tail vertebras 120, hind foot 30, ear 15; length of skull 

 31, width 16. 



Oryzomys bauri Allen. 



Oryzomys bauri Allen, Bull. Am. Mus. Nat. Hist. v. 4, 1892, p. 48. 



Range. — Barrington Island (Baur, Hopkins Expedition). 



This species is very closely allied to O. galapagoensis ^ 

 differing mainly in having a somewhat shorter tail and less 

 yellow on the upper parts. 



1 Waterhouse, Zool, Voy. Beagle, Mamm. 1839, p. 65. 



