ECHINIDEA. 



507 



That Omnipotent Creator, infinite in His resources — who, 

 in at least the details of His workings, seems never yet to 

 have repeated Himself, but, as Lyell well expresses it, 

 breaks, when the parents of a species have been moulded, 

 the dye in which they were cast, — manifests Himself, in 

 these four great ideas, as the unchanging and unchangeable 



Fig. 242. — Holothundea, Sea-cucumbers. 



One. They serve to bind together the present with the 

 past, aud determine the unity of the authorship of a wonder- 



