314 THE WIIALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



PLATE 18. 



Figure 1. Balmwptera musculus (L.). No. 5 S . Ventral view, showing small amount of light color on the 

 abdominal ridges. 



Figure 2. The same species. No. 21 i . Ventral view, showing large area of whitish color on the abdominal 

 ridges. 



Figure 3. The same species. No. 9 S . Ventral view, showing large amount of light color on the abdomi- 

 nal ridges. 



Figure 4. The same species. No. 9 $ . Showing the profuse light spots on the belly. 



All specimens from Balena Station, Hermitage Bay, Newfoundland. 



PLATE 19. 



Figure 1. Balcpnoptcra musculus (L.). No. 7 a . Ventral view, showing small amount of light color on the 



abdominal ridges. 

 Figure 2. The same species. No. 8 ? . Navel region. 

 Figure 3. The same species. No. 23 $ . Lateral view of the mammary fossa? and inidendum, showing the 



slight projection of these parts. 

 Figure 4. The same species. Piece of skin from the flanks, showing mottled coloration. 

 All specimens from Balena Station, Hermitage Bay, Newfoundland. 



PLATE 20. 



Figure 1. Balanoptera musculus (L.). No. 8 s . Pudendum, mammary fossae, and anus. (The mammas are 

 in the furrows which are intermediate between tlie median line and the external furrows.) 



Figure 2. The same species. No. 21 9 . Pudendum, mammary fossse, and anus ; for comparison with pre- 

 ceding figure. (The mammw are in the long furrow nearest the median line on each side) : a. clitoris ; 

 h. mammary fossa ; c. orifice of vagina ; d. anus. 



Figure 3. The same species. No. 11 i . Orifice of penis sheath and mammary fossae containing rudimentary 

 mammae : a. orifice of penis sheath ; h. mammary fossa?. 



Figure 4. The same species. No. 15 i . Ventral view, showing (a) penis sheath ; (h) mammary fossae, and 

 (c) anus. 



All specimens from Balena Station, Hermitage Bay, Newfoundland. 



PLATE 21. 



Figure 1. Balcenoptei-a ?inisciihis (L.). No. 8 S . Pectoral fin, showing abnormal extremity. Dorsal view. 



Figure 2. The same. Ventral view. 



Figure 3. The same species. No. 21 s . Left pectoral. 



Figure 4. The same species. No. 7 .; . Left pectoral, showing incised extremity. 



Figure 5. The same species. No. 4 ? . Left pectoral. 



All specimens from Balena Station, Hermitage Bay, Newfoundland. 



PLATE 22. 



Figure 1. Bahcnoptera acuto-rostrata Lacepede. No. 20931, U. S. National Museum. Off Monomoy 



Point, Harwiohport, Mass. Young. Dorsal view. 

 Figure 2. The same species. No. 13877, U. S. National Museum. Coast of Norway. Adult. Dorsal view. 



PLATE 23. 



Figure 1. Balcenojttera daridsoni Scammon. Type-skull. No. 12177, U. S. National Museum. Admiralty 



Inlet, Puget Sound, Washington. Dorsal view. 

 Figure 2. The same species. No. 61715, U. S. National Museum. St. Paul Island, Pribilof Group, Bering 



Sea. Dorsal view. 



PLATE 24. 



FKiURE 1. Bakeiioptera acuto-rostrata Lacepede. No. 20931, U. S. National Museum. Off Monomoy 



Point, Harwichport, Mass. Young. Ventral view. 

 Figure 2. The same species. No. 13877, U. S. National Museum. Coast of Norway. Adult. Ventral view. 



PLATE 2.5. 



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



Inlet, Puget Sound, Washington. Ventral view. 

 Figure 2. The same species. No. 61715, U. S. National Museum. St. Paul Island, Pribilof Group, Bering 



Sea. Ventral view. 



