lO 



Part first. 



Fig. 21. Plmrobranchtis testudinarius, 

 i/o nat. size. p. 94. 



Fig. 22. Katica millepwiciata, 

 1/2 nat- size. p. 93. 



Fig. 24. Three specimens of 



Mytilus galloproviucialis (Edible Mussel),^ 



attached to a pice of rope, 



1/0 nat. size. p. 97. 



^^t*^^i^^- 



Fig. 23. Miircx brandaris, 

 ^2 nat. size, p. 93. 



Fig. 25. Pccfcn jacobams 



(Scallop), 



1/2 nat. size. p. 98. 



Fig. 26. Two specimens of 



Lithodomus dactylus, within a pice of tufa, 



1/2 nat. size. p. 97. 



Fig. 27. rholas dactylus (Piddockj, 



in a stone, 



1/2 nat. size. p. 97. 



