568 



ZOOLOGY 



SECT. 



two pairs of maxillce. The mandibles have 110 palps : one or 

 both pairs of maxillae usually possess palps; the second pair of 

 maxillae are in some groups more or less united together. 



The number of segments in the body varies from 12 to 173. In 

 the Millipedes the dorsal walls of the segments are very strongly 



cutt 



brn 



shorn. 



mal 



cox.ap 



Fir;, 449. SCOlOpendra. (From 



Cuvier's An'mml Kii'!/<!oin.) 



FIG. 450. Lithobius forficatus seen from the- 

 ventral side. ant. antenna?; &r. brain ; cox. dp. 

 coxae of appendages : ft. 15, fifteenth pair of legs ; 

 int. intestine ; mal. Malpighian tubes ; mxp, 

 rnaxillipedes ; ne. co. nerve cord ; as. oesophagus ; 

 stom. stomach. (From Leuckart.) 



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 

 stigmata open. In the Chilopoda each segment bears a pair of 

 jointed legs ; of these the most anterior pair is extended forwards 



