‘Report U.S. F. C. 1883.—True. Cetaceans, PLATE X. 
28, Megaptera versabilis, Cope. Pacific Humpback Whale. 
Length, 48 feet. (After Scammon.) 
29. Balenoptera Davidsoni, Cope. Little Piked Whale. 
Length, 30 feet. (After Scammon.) 
30. Physalus antiquorum, Gray. Common Fin-back Whale. 
Length, 70 feet. (After Sars.) 
GENERA OF CETACEANS. 
