Spiral movement in mice

Blindfolded mice ( Peromyscus maniculatus bairdii Hoy and Kennicott) and mice which are not old enough to have opened their eyes, when placed in a tank 5½ft. in diameter, exhibit a very striking tendency to swim in clock-spring or helical spirals of three to ten inches in diameter. Some turn to the right, some to the left, and some either way, suggesting an hereditary basis for right- or left-turning. The natural movement of mice is spiral in direction and shape.