SEA-ANEMONES : THEIE WEAPONS. 375 



the work which it has to do. We must remember that all 

 this complexity is found in an animal which it is customary 

 to consider as of a very simple structure. But the ways 

 of God are past finding out. These are but parts of His 

 ways.* 



* The presence of these very remarkable organs is not limited to the 

 Actinoids. They exist in the entire class of Polyps, including the 

 Medusae, also in the Synaptas (see p. 299 supra), many Twrlellari<e, some 

 of the Annelids, and a few among the Mollusca. Dr. R. Bergh of 

 Copenhagen has published (1861) some elaborate researches, proving 

 the existence of nrticating cnidse, in abundance, in several forms of the 

 charming Naked-gilled Mollusca, allied to Eolis ; while they seem to be 

 wanting in the tougher-skinned Doris, &c. 



