The image is a vintage, hand-drawn diagram of a worm, likely from an anatomical or scientific text. The worm is depicted in profile, curving from the bottom left to the top right of the page. It's segmented, with each segment clearly delineated by a line, giving it a cylindrical appearance. The head is pointed, and the body tapers slightly towards the tail. Above and to the right of the worm, there are Chinese characters, likely labels or descriptions related to the anatomy of the worm. To the left of the worm, the characters read '內' (nèi), meaning 'internal', and to the right, '外' (wài), meaning 'external'. Above the worm, the characters read '圖之面側骨脊' (tú zhī miàn cè gǔ jǐ), which translates to 'diagram of the side bone spine'. The background is a pale yellow, aged paper with a simple rectangular border. The style suggests a historical scientific illustration, possibly from a traditional Chinese medical or biological text.