REPRODUCTION AND GROWTH 



273 



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Fig. 18. — Spawn of shore animals, i, Spawn of Littorina obtusata on 

 Fuctts serratus ; 2, Egg-cases of whelk {Buccinum undatum); 3, Spawn of 

 Natica ; 4, Egg-ribbon of Dorid ; 5, Egg-cases of Fulgtir ; 6, Spawn of 

 Polychaet ; 7, Egg and capsule of Littorina littorea (after Tattersall) ; 

 8, Egg capsules of Purpura lapillus. 



