20 



[Senate 



FAMILY CASTORID^. 



Fiber zibethicus, MusJcrat, or Musquash, (male & f.) 75 



FAMILY MURID^. 



Mus DECUMANUs, Browu Rat, (male & female.) - - 79 



Mus MuscuLUS, Common Mouse, (male & female.) 82 



Mus LEUcopus, Jum'ping Mouse, (female.) - - - 82 



Arvicola rtjfescens, Tawny Meadow Mouse, (male.) - 85 



Arvicola hirsutus, Beaver Field Mouse, (male.) - - 86 



