BANGS: LAND MAMMALS OF FLORIDA AND GEORGIA. 199 
P. niveiventris is entirely confined to the sandy beaches and 
adjacent sand hills of the east coast of Florida, and never to my 
knowledge has been found inland. Its life depends on the sea oats, 
and it is never found where that plant does not grow. It is very 
abundant in favorable places, and its presence can always be 
detected by its little foot-prints which show distinctly in the white 
sand around the tufts of sea oats. 
At the type locality I took, in January and February, 1896, over 
one hundred specimens, and have examined specimens from Jupiter 
Inlet and Palm Beach. 
Peromyscus phasma sp. nov. 
Type from Point Romo, Anastasia Island, Florida, 9 adult No. 
7,175, collection of E. A. and 0. Bangs. Collected, Feb. 15, 1897, 
by O. Bangs. 
General characters. Size and proportions of P. 7iiveiventris ; 
color different, being paler; the white of under parts extending 
farther up on the sides, on the cheeks to the eye, and covering the 
whole legs (in P. niveiventris the upper side of legs is colored 
like the back); nose and face white to the eyes; a white stripe over 
the eye; a white spot at base of ear. 
Color. Adult, upper parts: varying from pale drab-gray to 
pinkish buff, the drab-gray predominating on middle of back and 
between ears, the pinkish buff on sides of back rump and between 
eye and ear; top of nose, a line or spot above eye, and a spot at base 
of ear white. Under parts, snowy white to base of hairs, the white 
extending high up on sides, leaving the colored portion of back 
scarcely wider than the dorsal stripe in many species; tail unicolor, 
white, sparsely haired; hands, feet, arms, and legs, both above and 
below, white; ears drab-gray with many silvery hairs on both inner 
and outer surfaces. 
Measurements. The type 9 adult: total length, 141; tail verte¬ 
brae, 54; hind foot, 19; ear from notch, 13.5. Average of ten 
adult topotypes, $ ’s and 9’s: total length, 138.5; tail vertebrae, 
53.5 ; hind foot, 18.7 ; ear from notch, 14. 
General remarks. This lovely little mouse is apparently an 
island form confined to Anastasia. It fairly swarmed on the sand 
hills at the lower end of the island, where I took a series of twenty- 
nine specimens. I caught many more, but ants and hot, damp 
