Close-up view of Chimpanzee "Mary", ca.1940

Photograph of a close-up view of Chimpanzee "Mary", ca.1940. Mary's dark head can be seen at center with a relatively large, smooth ear. The dark fur covers her shoulders and the back of her head, but is thin on top and non-existent around her eyes and nose. She's facing the right.该照片为黑猩猩（Chimpanzee）“玛丽”的特写影像，拍摄于约1940年。画面中心呈现玛丽的深色头部，其耳部相对较大且质感光滑。深色皮毛覆盖其肩部与脑后区域，但头顶毛发稀疏，眼部及鼻部周围完全无毛发。它面朝右侧。