..^I^fc 



Fig. 17. — LafVae of common shore animals, i , Blastula stage oi Leucosolenia 

 (after Minchin) ; 2, Trochophore of Polychjet worm (after McBride) ; 3, 

 Bipinnaria larva of starfish {Asterias riibens) ; 4, Nauplius larva of barnacle ; 

 5,6, Zooea and megalopa stage of common shore crab (after Williamson) ; 

 7, Phyllosoma larva (glass-crab) of spiny crayfish ; 8, Veliger of periwinkle, 

 Littorina littorea (after Tattersall) ; 9, Young flounder. 



