SCOUTING FOR GIRLS 
379 
salamanders; (3) Reptiles, which include alligators, 
crocodiles, turtles, lizards, and snakes; (4) Birds; (5) 
Mammals. 
This simple analysis may be clearly shown by the 
following diagram: 
Objects 
of 
Nature 
’ Animals 
r Living Bodies < 
( Organic ) \Plants 
Non-living Bodies 
( Inorganic ) 
Vertebrates 
Invertebrates 
/ Mammals 
\ Birds 
1 Reptiles 
& Amphibians 
\ Fishes 
5 Flowering Plants 
| Flowerless Plants 
This classification could be carried further at every 
point, but this will be far enough for present purposes. 
It should be remembered in any classification that there 
are no hard and fast lines in Nature. For example, some 
creatures are on the border-land between plants and ani- 
mals, and again some animals are between the backboned 
animals and those without backbones. 
