EXPLANATION OF PLATES. 315 



PLATE 26. 



FIGURE 1. Balcenoptera davidsoni Scammon. Type-skull. No. 12177, U. S. National Museum. Admiralty 



Inlet, Puget Sound, Washington. Lateral view. 

 FIGURE 2. Balcenoptera acuto-rostrata Laceptkle. No. 20931, U. S. National Museum. Off Monomoy Point, 



Harwichport, Mass. Young. Lateral view. 

 FIGURE 3. The same species. No. 13877, U. S. National Museum. Coast of Norway. Lateral view. 



PLATE 37. 



FIGURE 1. Balcenoptera davidsoni Scammou. No. 61715, U. S. National Museum. St. Paul Island, 



Pribilof Group, Bering Sea. Lateral view. 

 FIGURE 2. Balcenoptera acuto-rostrata Lacepede. No. 20931, U. S. National Museum. Off Monomoy Point, 



Harwichport, Mass. Young. Lateral view. 

 FIGURE 3. The same species. Right scapula of skeleton No. 13877, U. S. National Museum. Coast of 



Norway. Adult. 

 FIGURE 4. The same species. Scapula of skeleton No. 20931, U. S. National Museum. Off Monomoy Point, 



Harwichport, Mass. Young. 

 FIGURE 5. The same species. Sternum of skeleton No. 13877, U. S. National Museum. Coast of Norway. 



Adult. 

 FIGURE 6. The same species. Sternum of skeleton No. 20931, U. S. National Museum. Off Monomoy Point, 



Harwichport, Mass. 



PLATE 28. 



FIGURE 1. Balcenoptera davidsoni Scammon. Valdes, Alaska. Ventral view. Photographed by F. C. 

 Schroeder, U. S. Geological Survey. 



FIGURE 2. The same specimen. Dorsal view. 



FIGURE 3. Balcenoptera acuto-rostrata Lacepede. Quoddy Head, Maine. Ventral view. 



FIGURE 4. The same specimen. Lateral view. 



FIGURE 5. Balcenoptera velifera (?). Anterior portion of skeleton in Wistar Institute, University of Penn- 

 sylvania. Coast of California. 



FIGURE 6. The same, showing cervical and anterior dorsal vertebrae. 



PLATE 29. 



FIGURE 1. Megaptera bellieosa Cope. Type-skull. San Domingo or St. Barthlomew Island, West Indies. 



Philadelphia Academy of Natural Sciences. Dorsal view. 

 FIGURE 2. Megaptera nodosa (Bonnaterre). No. 21492, U. S. National Museum. Cape Cod, Mass. Dorsal view. 



PLATE 30. 



FIGURE 1. Megaptera bellieosa Cope. Type-skull. Ventral view. 



FIGURE 2. Megaptera nodosa (Bonnaterre). No. 21492, U.S. National Museum. Cape Cod, Mass. Ventral view. 



PLATE 81. 



FIGURE 1. Megaptera bellieosa Cope. Type-skull. Lateral view. 



FIGURE 2. Megaptera nodosa (Bonnaterre). No. 21492, U. S. National Museum. Cape Cod, Mass. Lateral view. 



FIGURE 3. The same species. Cape Cod, Mass. Milwaukee Public Museum. Lateral view. 



PLATE 32. 



FIGURE 1. Megaptera nodosa (Bonnaterre). No. fff Sf , S , U. S. National Museum. Provincetown, Mass. 



Young. Dorsal view. 

 FIGURE 2. The same species. Cape Cod, Mass. Milwaukee Public Museum. Dorsal view. (The figure is 



much distorted.) 



PLATE 33. 



FIGURE 1. Megaptera nodosa (Bonnaterre). No. -}ffff, S , U. S. National Museum. Provincetown, Mass. 



Young. Ventral view. 

 FIGURE 2. The same species. Cape Cod, Mass. Milwaukee Public Museum. Ventral view. 



