Spider are apparently absent. In some species, the exocuticle of the legs and prosoma is modified by a tanning process, resulting in brown coloration. Bilins are found, for example, in "Micrommata virescens", resulting in its green color. Guanine is responsible for the white markings of the European garden spider "Araneus diadematus". It is in many species accumulated in specialized cells called guanocytes. In genera such as "Tetragnatha", "Leucauge", "Argyrodes" or "Theridiosoma", guanine creates their silvery appearance. While guanine is originally an end-product of protein metabolism, its excretion can be blocked in spiders, leading to an increase in its storage. Structural colors
Chinese garden with the Longevity Pavilion on the north side, the Fry Pavilion on the east side, a dramatic rock garden on the south, and the creator's study, the Humble House, to the west. The Qing dynasty was the last dynasty of China. The most famous gardens in China during this period were the Summer Palace and the Old Summer Palace in Beijing. Both gardens became symbols of luxury and refinement, and were widely described by European visitors. Father Attiret, a French Jesuit who became court painter for the Qianlong Emperor from 1738 to 1768, described the Jade Terrace of the Isle