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. 



A B s 



Fig. 105.~Oommon Gaeden Spiper. — A, as seen from above ; B, as seen from below ; p^ 

 Talpi ; in. Mandibles ; fi, Spinnerets from which the Spidor^s Tliread 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 muph like legs, and in very young spiders 

 can scarcely be distinguished from them. 



o A 



p m 



Tig. 106. — Side-Yiew of Common Gaeden Spideii. — C, Ceptialo-thorax; A, Abdomen; 1,2, 

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



