FLORIDA RAT. 37 



and considerately. It is certain that this genus cannot be arranged either 

 under Arvicola or Mus, without enlarging the characters of one or the 

 other of these genera. Another species, from the Rocky Mountains, has 

 been discovered by Dr. Richardson, {Neotonia Drmnmojidii,) and we feel 

 pretty confident that the genus will be generally adopted. 



