ILLUSTRATIONS 



36 Pectoral limb bones of some cetaceans 223 



37 Muscle attachments of the cetacean pectoral limb . . .237 



38 Medial musculature of the sea-lion pectoral limb . . . 240 



39 Medial musculature of the seal pectoral limb . . . .241 



40 Forearm bones of the Steller sea cow 245 



41 Outlines of cetacean and pinniped flippers . . . .252 



42 Fore feet of some amphibious mammals 257 



43 Hind feet of some amphibious mammals .... 270 



44 Hind feet of pinnipeds 274 



45 Hind limb of seal and sea-lion 278 



46 Hind limb musculature of the sea otter 282 



47 Hind limb musculature of Potomogale 286 



48 Hind limb musculature of Desmana 289 



49 Pelvic bones of seal and sea-lion 293 



50 Pelvic bones of sirenians 297 



51 Pelvic bones of cetaceans 301 



52 Femora of sea-lion and seal 304 



53 Foot bones of sea-lion and seal . . . 308 



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