f'.C) 



M()N<)(!I!AI'IIH OF NOltTII AMIMJICAN KODBNTIA. 



so lliis iliiirnctcr liills to tlu; gromid. And to (iimlly settle the question of the 

 iictiiul (.■xistencc of ti s|)cii('s combining cheek-poiiclies witli a long tail, we 

 svill inlniilucc tliu l()l!o\ving table.* 



'l'.\lii.K \l\.~l'ri«li iiim«urimnilH uj :hirly-oiiv KpmmeiiH of IIi.hI'KIIomys " imjoidiH" from ylrctic America. 

 lAII llitm* iniijMiiromf iilH nvv. friiiii Miii'cliiii'tm In tlii' llitth, cxi'i'iit tlir Hcvrnth column, tlie tviyi buluR niL-OMured dry.] 



*Tlii» Arctic 



< is ..iiinply a piirt (if tlic Arctic scries iiitrmluct il fiirtlicr on. Jt rcprcKentH the 

 variety s:morwmu, ami is only l)ron«lit m here to show the matter of the ehcek-poiiehes, Wc have 

 only to icuiark further, in this iilae,., that the Arctic series averages larger thau 'Juited States siieoiuieua, 

 anii has shorter feet and ears, as well as shorter tail. 



