The variety of T. navalis found on the southern New England coast is normally protandric, the [female] phase being assumed at the close of a brief functional [male] phase while the animal is very small. Those individuals which complete both these sexual phases before the approach of winter may then restore the bisexual character of the immature gonad and during the second summer repeat the [male] and [female] phases of the previous year. Survival for more than 2 winters is unusual.