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This study explores the interrelationship between the genus Canis and hunter–gatherers through a case study of prehistoric Native Americans in the San Francisco Bay-Sacramento Delta area. A distinctive aspect of the region's prehistoric record is the interment of canids, variously classified as coyotes, dogs, and wolves. Since these species are difficult to distinguish based solely on morphology, ancient DNA analysis was employed to distinguish species. The DNA study results, the first on canids from archaeological sites in California, are entirely represented by domesticated dogs (including both interments and disarticulated samples from midden deposits). These results, buttressed by stable isotope analyses, provide new insight into the complex interrelationship between humans and canids in both ritual and prosaic contexts, and reveal a more prominent role for dogs than previously envisioned.  相似文献   
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Benjamin Vaughan had a passion for anonymity. This is the first attempt to provide a full list of his many and significant contributions to intellectual life and letters in the last quarter of the eighteenth century. No attempt has been made to unveil Vaughan’s scientific writings, and only two of his productions after emigrating to the United States are here included, in both cases because they relate to his earlier writings. After coming to the United States, Vaughan renounced further involvement in the affairs of Europe.  相似文献   
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