THE ANIMAL KINGDOM. 



261 



limited capacity has not yet taught them to invent the pro- 

 tecting door. Spiders are more ingenious. There are 



155. Nest of the Penduline Titmouse— Parus xienduUnus (Latham). — From the Eouen 



Museum. 



some which, as we have seen, understand how to secure 

 themselves in their subterranean abodes by a skilfully con- 

 structed door. Some birds take analogous precautions. 

 In his work on the Birds of India, M. Jerdon details 



