127 



broad chisel-like incisor teeth for cutting off the foliage, 

 and teeth of very similar form are developed in the dif- 

 ferent groups of plant- 

 eating fishes. Molar 

 teeth are found when it 



FIG. 58. Scorpion, showing the special devel- 

 opment of certain mouth parts (the maxil- 

 lary palpi) as pincer-like organs for grasp- 

 ing prey. At the posterior tip of the body 

 is the poisonous sting. 



FIG. 59. Head of mosquito (fe- 

 male), showing the piercing 

 needle-like mouth parts which 

 compose the "bill." 



is necessary that the food should be crushed or chewed, 



and the sharp canine teeth go with a flesh diet. The 



long neck of the giraffe 



(Fig. 57) enables it to 



browse 011 the foliage of 



trees. 



Insects like the leaf- 

 beetles and the grasshop- 

 pers, that feed on the 

 foliage of plants, have a 



" J FIG. 60. The praying-horse (Mantis) with 



pair Ol jaws, broad but fore legs developed as grasping organs. 



