Plate XXVI, 



. uSinclaiT s lith, Phil^ 



L6 ISCHYROMYS TYPUS. 7_11 PALAEOCASTOR NEBRASCENSIS. 12_13 EUMYS ELEGANS. 



14_20 PALAEOLAGUS HAYDENI 21_22 CASTOR TORTUS. 23_24 HYSTH^CA^]' ^''5 



25_28 lEPTIGTIS HAYDENL 29_30 ICTGPS DAKOTENSIS. 



