110 



FIRST BOOK OF ZOOLOGY. 



thorax. The hinder region is called the abdomen. Instead 

 of having a separate head, as in true insects, the spider has 

 its head and thorax combined, and hence this part is called 

 the cephalo-thorax, a compound word meaning head-thorax. 



p 



A s 



FIG. 105. COMMON GARDEN SPIPER. A, as seen from above; B, as seen from below; p, 

 Palpi ; 7tt, Mandibles ; s, Spinnerets from which the Spider's Thread issues. 



102. The spider has four pairs of legs, instead of three 

 pairs of legs as in the true insects. Projecting in front are 

 a pair of jointed feelers called palpi (see Fig. 105, p). 

 These look very much like legs, and in very young spiders 

 can scarcely be distinguished from them. 



c A 



12pm 3s 4 



FIG. 106. SIDE-VIEW OF COMMON GARDEN SPIDER. -G, Cephalo-thorax ; A, Abdomen ; 1, 2, 

 8, 4, First, Second, Third, and Fourth Pairs of Legs ; s, Spinnerets ; m, Mandibles ; /;, Palpi. 



