. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. SPIDEBS AND MITES. 207 from its thinness is semi-pellucid, but the eyes transmit the light with brilliance, not, however, as if they were simple round holes, because you can discern very mani- festly a hemispherical glassy coat, by which it is refracted. It is, however, when we examine the forehead of a living or recently killed spider, that we see the eyes to advan- tage. In this example of the same species (Clubiona atrox), you see them, like polished globes of
. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. SPIDEBS AND MITES. 207 from its thinness is semi-pellucid, but the eyes transmit the light with brilliance, not, however, as if they were simple round holes, because you can discern very mani- festly a hemispherical glassy coat, by which it is refracted. It is, however, when we examine the forehead of a living or recently killed spider, that we see the eyes to advan- tage. In this example of the same species (Clubiona atrox), you see them, like polished globes of diamond, sunk into the solid skin of the head. Their form is unimpeachably perfect, and the reflection of light from their surface most EYES OF SPIDER. The arrangement of these lustrous eyes is worthy of attention. They are generally eight in number in Spiders, but their relative position varies so much, as to afford good characters by which naturalists have grouped them in genera. In the Clubiona which we have been examin- ing, they are placed in two nearly straight transverse rows on the forehead ; but as this surface is convex, it follows that the axis of every eye points in a different direction from that of its fellows. In Epeira, on the other hand, represented by our great Garden Spider, so commonly seen. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gosse, Philip Henry, 1810-1888. London : Society for Promoting Christian Knowledge
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