t xr . . * PLATE 3 
A. —Young just bom. 
B. —Young four days old. 
C. —Young seven days old just before the eyes and ears open. 
, 2? e y°|“? ^ birth are naked, blind, toothless, and helpless, weighing only about 
3 gm. each, but they grow rapidly. All about natural size * y 
