Twelve water snakes, 11 litter mates born of the 12th, were run in a 2 unit alley water maze of the T design. The incentive was a lower degree of temp. in the maze proper than in the goal compartment. Error and time scores showed typical learning with marked individual differences. Periodic interruptions in training were necessary when the snakes shed their skins, just before and after which time the learning was always retarded. Tactual cues seemed to play the dominant role although vision was observed to be occasionally used.