BANGS: LAND MAMMALS OF FLORIDA AND GEORGIA. 227 
mastoid jbreadth, 67; interorbital constriction, 21.8 ; greatest con¬ 
striction behind postorbital processes, 17.8: distance across post- 
orbital processes, 30 ; last upper molar to end of pterygoid process, 
27; foramen magnum to end of palate, 49.2; greatest length of 
single half of mandible, 68.4. 
General remarks. The Florida otter is generally distributed 
over Florida and eastern Georgia, being found in both fresh and 
salt water, though rather more common along the coast than in the 
interior. Formerly very abundant, it is steadily and, I am afraid, 
rapidly decreasing in numbers, being extensively trapped for its 
fur. It often breeds in the winter, at a time when it is trapped the 
most, and this may partly account for the rate at which it is 
decreasing. 
Mr. Brown took one otter at Pinetucky, Georgia, and one at Hurs- 
man’s Lake, Georgia; both are females. These two specimens are 
of interest as showing the first steps of an intergradation with X. 
hudsonica typica. They are in every way intergrades, but favor 
vaga rather more than hudsonica typica. 
X. hudsonica vaga can always be separated from X. hudsonica 
typica , by the skull; the deep, long constriction behind postorbital 
processes, and large mastoid process with great width across that 
part of the skull, give it a very distinct appearance. The color of 
the two forms is also very different, X. hudsonica vaga being much 
the redder of the two, and never showing the dark seal brown 
sometimes almost black shades of hudsonica typica. X. hudsonica 
vaga is also rather the larger and has a longer tail. 
Putokius (Lutreola) visox lutreocephalus (Harlan). 
Mustela lutreocephala Harlan, Fauna Amer., 1825, p. 63. 
Putorius vison lutreocephalus Bangs, Proc. Bost. soc. nat. hist., 
1896, vol. 27, p. 4. 
Type locality. Maryland. 
The big brown or Carolinian mink occurs in interior Georgia, 
where it lives in swamps and along streams. It is replaced on the 
salt marsh of the coast by a very different form (described below 
as P. lutensis). Mr. Brown took the two forms within one hundred 
miles of each other; at Pinetucky, Georgia, taking two splendid 
old males of P. lutreocephalus , and at Montgomery on the salt 
marsh, eight examples of P. lutensis. In this short interval it does 
