Genus BERARDIUS Duvernoy. BERARDIUS ARNUXII Duvernoy. New Zealand. BERARDIUS BAIRDII Stejneger. North Pacific Ocean; Bering Island and St. George Island, Bering Sea, to Kiska Harbor, Alaska, and Centerville, California.

Genus HYPEROÖDON Lacépède. HYPEROÖDON AMPULLATUS Forster. Arctic and North Atlantic oceans; Mediterranean Sea; southern France; New York Bay, Newport, Rhode Island, and Cape Cod, Massachusetts. HYPEROÖDON PLANIFRONS Flower. Indian and Pacific oceans; Lewis Island, Australia; Province of Buenos Ayres, Argentina, and territories of Chubut and Santa Cruz, Patagonia.

FOOTNOTES

[1]As this species is well known, the skeleton is not described in this paper.

[2]Amer. Nat., vol. 40, 1906, p. 366.

[3]Proc. Boston Soc. Nat. Hist., vol. 11, 1866-68, p. 318.

[4]Idem, vol. 29, 1899, p. 9.

[5]Amer. Nat., vol. 40, 1906, p. 357.

[6]Proc. Boston Soc. Nat. Hist., vol. 11, 1866-68, p. 318.

[7]One of the teeth of Sowerby’s specimen is figured by Lankester in Trans. Roy. Micr. Soc., new ser., vol. 15, 1867, pl. 5, figs. 1, 2.