1. Nshiwaki, M., and Kamiya, T., Bull. Jap. Soc. Sci. Fish., 24 (6, 7), 445 (1958).
2. Nishiwaki, M., and Kamiya, T., Sci. Rep. Whales Res. Inst., No. 13, 53–83 (1958).
3. Moore, J. C., Amer. Mus. Novitates, No. 1993, 1 (1960).
4. Moore, J. C., in Whales, Dolphins, and Porpoises, edit. by Norris, K. S. (Univ. of California Press, in the press).
5. Raven, H. C., Amer. Mus. Novitates, No. 905, 1 (1937).