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
Garden railway European quality equipment can be found at scale 1:32, at a cost. There exists a few garden trains at a smaller scale but maintenance is more difficult. And the scale '0' with standard gauge run on a track of and is actually at scale of 1:43.5 in France & UK, 1:45 in Germany and 1:48 in the USA... These will be used to provide citation links: Garden railway A garden railroad or garden railway ("railroad" in the US, "railway" elsewhere) is a model railway system set up outdoors in a garden. While G is the most popular scale for garden