226 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
No. 4,995 (measured by W. L. Gibson): total length, 1,100; tail 
vertebrae, 400 ;* hind foot, 110. 
Skull, the type g young adult: basal length, 106.6; zygomatic 
breadth, 71; mastoid breadth, 71.2 ; interorbital constriction, 24; 
greatest constriction behind postorbital processes, 18.6; distance 
across postorbital processes, 35 ; last upper molar to end of ptery¬ 
goid process, 29.8 ; foramen magnum to end of palate, 51.6 ; greatest 
length of single half of mandible, 74.4. An adult ? from Rose- 
land, Florida, No. 4,995 : basal length, 99; zygomatic breadth, 70.3 ; 
Lutra hudsonica hudsonica, adult $. 
1 The collector’s measurement for tail seems too short, judging by the skin. 
