610 



ZOOLOGY 



palps; one or both pairs of inaxillse usually possess palps; the 

 second pair of maxillae, are in some groups more or less united 

 together. In the Chilopoda the first pair of legs of the trunk 

 are specially modified to act as poison--jaws (maxillipedes), by 

 means of which the Centipede inflicts its poisonous bite. 



Fin 4S7.— Scolopendra. (Prnm 

 Cuvier's Aumuil Knia'!"iii.) 



Fkj. 4SS.— Lithobius forficatus scon from the 

 ventral side. ani. antcnnje ; brn. brain : cox. ap. 

 coxte of appendages ; ft. 15, fifteenth pair of legs ; 

 int. intestine; ■inal. Malpighim tubes; 'nu-p. 

 maxillipedes; ve. ro. nerve cord; o's. cesophagus ; 

 .s/(jj». stomach. (P^rom Leuckart.) 



The number of segments in thebod^' varies from 10 to 173. In 

 the Millipedes the dorsal walls of the segments are very strongly 

 arched ; in the Centipedes the segments are all dorso-ventrally 

 compressed, with distinct tergal and sternal shields separated 

 laterally by intervals of comparatively soft skin on which the 



