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MTIRID^— AUVICOLIN^— ARVICOLA XANTHOGNATHHSf 205 



Tablk LI. — jVfco»iir«m«iita of iweiity-nine (and IM of many more) tpecimevi of large Arctic Arvicol^ of the 

 RIPAIIIOS ttpt, tuppoted to repreeenl xanthoonatiius without chettnut cheeks. 





