XXIX 



BY SUCKERS OR ALLIED STRUCTURES. 

 Plants. 



Examples. Ivy, Virginian-creeper. 



Animals. 



Examples. Arachnida : Hunting-Spider. 

 Insecta : many by pulvilli. 

 Entozoa : Tsenia. 

 Crustacea : Argulus. 

 Cephalopoda. 

 Pisces : Echeneis, &c. 

 Amphibia : Hyla. 

 Reptilia : Gecko. 

 Mammalia : Cheiroptera (Thyroptera). 



3. In Semi-solids (Earth, Mud, Sand). 



All burrowing animals derive shelter by this habit ; by it also 

 many obtain their food. 



BURROWING. 

 Plants. 



Examples. Seeds of some Grasses. 



Animals. 



By extensions and contractions of the whole or a part of the 

 body. 



Examples. Annelida : Lumbricus. 

 Pelecypoda : Solen. 

 Enteropneusta : Balanoglossus. 



By undulations or rotations of axis of body. 



Examples. Pisces : Eel. 



Amphibia: Gymnophiona. 

 Reptilia : some Ophidia. 



By Spines. 



Example. Echinodermata : Spatangus. 



