. An introduction to zoology, with directions for practical work (invertebrates). 180 INTRODUCTION TO ZOOLOGY spoken of as the mandibles, though probably not homologous with the mandibles of insects), and a pair of six-jointed feelers, very like legs, known here as the pedipalps. The last joint of the latter contains, in the adult male spider, a complex " palpal organ "—a sexual organ in which the sperm cells are tem- porarily stored (Fig. 114, pp). The structure and life- history of the Common Garden Spider will elucidate many points in the structure and life - history of the Aranea
. An introduction to zoology, with directions for practical work (invertebrates). 180 INTRODUCTION TO ZOOLOGY spoken of as the mandibles, though probably not homologous with the mandibles of insects), and a pair of six-jointed feelers, very like legs, known here as the pedipalps. The last joint of the latter contains, in the adult male spider, a complex " palpal organ "—a sexual organ in which the sperm cells are tem- porarily stored (Fig. 114, pp). The structure and life- history of the Common Garden Spider will elucidate many points in the structure and life - history of the Araneae generally. General Form. Type: The Common Cross Spider [Epeira diademata). Epeira diademata is the largest of our common garden spiders, and in the autumn, when it is full grown, it is easily found in nearly every garden, where its large, vertical, beauti- fully constructed web will be hung in many a sheltered corner. The spider is a brownish-yellow or reddish-brown colour of varying shades, and it can readily be recognised, when viewed from above (Fig. 113), by the white spots and lines on the back of the abdomen, arranged in the form of a cross, whence the creature gets its name of " cross " spider. The body of the female spider may be quite fths of an inch long, but the male is a little smaller. In a dorsal view, the union of head and thorax is obvious, but Fig. 113.—TheCoramonCrossSpider the constriction between thorax and abdomen is largely hidden by the overhanging of the latter. On the head of the spider shown, can be seen the eight simple eyes and the forwardly projecting pedipalps, but the jaws, which hang down vertically, are not visible. These are best examined from a front view such as. (Epeira diademata). (View from above. The line to the right shows the actual length.) The Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustratio
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