20 MANUAL OF THE MOLLUSCA. 



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Lastly, the mollusca exhibit the same instinctive care with 

 insects and the higher animals, in placing theii' eggs in situations 

 where they will be safe from injuiy, or open to the influences of 

 air and heat, or surrounded by the food which the young will 

 require. The tropical bulimi cement leaves together, to protect 

 and conceal their lai'ge, bii'd-like, eggs ; the slugs bury theirs in 

 the ground ; the oceanic-snail attaches them to a ioating raft ; 



Fig. 9, lanthina with its raft. 



and the argonaut carries them in her frail boat. The horny cap- 

 sules of the whelk are clustered in gi'oups, with spaces pervading 

 the'interior, for the free passage of sea-water ; and the nidamental 

 ribbon of the doris and eolis is attached to a rock, or some 

 solid surface from which it will not be detached by the waves. 

 The river-mussel and ci/clas carry their parental cai-e still further, 

 and nurse their young in their own mantle, or in a special mar- 

 supium, designed, like that of the opossum, to protect them untU 

 tliey are strong enough to shift for themselves. 



If any one imbued with the spii-it of Paley or Chateaubriand, 

 should study these phenomena, he might discover more than the 

 " ban-en facts" which alone appear, without significance, to the 

 unspiritual eye ; he would see at every step fresh proofs of the 

 wisdom and goodness of God, who thus manifests his greatness 

 by displaying the same care for the maintenance of his feeblest 

 creatures, as for the well-being of man, and the stability of the 

 world. 



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