I LLUSTRATIONS 



36 Pectoral limb bones of some cetaceans 



37 Muscle attachments of the cetacean pectoral limb 



38 Medial musculature of the sea-lion pectoral limb 



39 Medial musculature of the seal pectoral limb 



40 Forearm bones of the Steller sea cow 



41 Outlines of cetacean and pinniped flippers 



42 Fore feet of some amphibious mammals . 



43 Hind feet of some amphibious mammals 



44 Hind feet of pinnipeds .... 



45 Hind limb of seal and sea-lion 



46 Hind limb musculature of the sea otter . 



47 Hind limb musculature of Potomogale 



48 Hind limb musculature of Desmana 



49 Pelvic bones of seal and sea-lion 



50 Pelvic bones of sirenians . 



51 Pelvic bones of cetaceans 



52 Femora of sea-lion and seal 



53 Foot bones of sea-lion and seal 



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