228 



ELEMENTARY ZOOLOGY 



The lithobians and centipeds are flattened and have 

 but a single pair of legs on each body-ring. They are 

 predaceous in habit, catching and killing insects, snails, 



earthworms, etc. They can 

 run rapidly, and have the first 

 pair of legs modified into a 

 pair of poison-claws, which 

 are bent forward so as to lie 

 near the mouth. The com- 



FIG. 87. The skein centi- 

 ped, Scutigera forceps, nat- 

 ural size, common in houses 

 and conservatories. (From 

 Marlatt.) 



FIG. 88. Acentiped, Scolo- 

 pendra sp. (From speci- 

 men.) 



mon ''skein" centiped (Scutigera forceps] (fig. 87) is 

 yellowish and has fifteen pairs of legs, long 4O-segmented 

 antennae, and nine large and six smaller dorsal segmental 



