108 ANIMAL STUDIES 



the eye of the squids and cuttlefishes has shown them 

 to be remarkably complex and in many respects to be 

 constructed upon much the same plan as those of the 

 vertebrates. As to the other senses not so much is known, 

 but undoubtedly many species of cephalopods are possessed 

 of a shrewdness and cunning not shared by any other 

 invertebrates, save some of the insects and spiders, and are 

 vastly more highly organized than their molluscan rela- 

 tives. 



