passes them not only in the development of its 

 sense of sight and hearing, but also in the construc- 

 tion of its brain : distinct nodes, or ganglia, supply 

 the nervous system, the largest ganglion being in 

 the head. 



This naturally presupposes a superior intelli- 

 gence ; and this is found to exist in fact. It is active 

 in the pursuit of prey, and, as Augusta F. Arnold, 

 the mother of modern amateur marine nature- 

 study, has so succinctly stated, it is "fierce and vo- 

 racious" — capacities which obviously cannot exist 

 in any creature without some degree of cunning. It 

 should be added, nevertheless, that its very vora- 

 city oftentimes leads to its own destruction. Twice 

 have I encountered it, once dead and once dying, 

 from having engulfed a creature larger than it 

 could conveniently swallow. But what is more to 

 the point, in the hunt for various worms and crus- 

 taceans upon which it largely lives, it must neces- 

 sarily expose itself. This it does only at night, 

 seeming aware of the dangers that threaten from 

 even greater and greedier animals which are sure 

 to attend an excursion during the day. Then it is, 

 when darkness comes, that it leaves its burrow or 



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