XXX 



By Limbs. 



Examples. Crustacea. 



Insecta : Gryllofcalpa. 

 Mammalia : Edentata, Talpa. 



By Teeth. 



Example. Some Rodentia. 



4. Locomotion and resting on Semi-solids (Mud, Sand, 

 Snow) and on Floating Bodies. 



The supporting surface of the animal is relatively great. The 

 expansion also often serves for other purposes. 



Animals. 



Examples. Porifera : some. 

 Aves : Jacari. 

 Mammalia: Camel, Lagopus, &c. 



5. Free in and on Water. 



Body made buoyant by gas or water, with increased resistance 

 to sinking by extension of surface. Associated in some with 

 greasy or waxy condition of surface, which prevents wetting. 



FLOATING. 

 Plants. 



Most plants and parts of plants will float owing to the low 

 specific gravity of cellulose and the large amount of gas and 

 water commonly contained in their tissues. Only such plants 

 as are specialized for floating are included here. 



Examples. Algae : Sargassum ; some Diatomaceae, many Phanero- 

 gams. 

 Animals. 



Examples. Rhizopoda : Globigerina, many Radiolaria. 

 Hydrozoa : Physalia, Porpita, Velella. 

 Anthozoa : Miuyas. 

 Bryozoa : Statoblasts. 

 Crustacea : Lepas. 

 Gastropoda : lanthiua. 



