110 



BOYS AND GIRLS IN BIOLOGY. 



glia, and they are larger than those of the head ; egg- 

 shaped and of a bright orange-color, so it is quite easy 

 to discover them. Indeed, you might imagine the mus- 

 sel wore tight boots, and that these were his " corns." 

 Each one gives off a nerve to the ear-bag, which you 



Fig. 103. 

 Intestine. Heart. 



know lies in the foot (Fig. 103). The brains, or head- 

 ganglia, give off cords, which run backward toward 

 the hindmost strap, or posterior adductor muscle, be- 

 low which they end in a pair of bunches, or ganglia, 

 called the parieto-splanchnic (Fig. 103), which means 



