NORTH BRITISH TESTACEA. 4I3 



Serpula. 



5. tubularia. M. Not uncommon on the coast* 



0. triquetra. P. D. M. In same situation. 



7. vermicularis. M. A small group came up bj 



the dredge in the Frith of 

 Forth ; also Leith Roads, 

 Belhaven, and Portobelle 

 Sands* 



VERMICULUM. 



Shell univalve ; shape various : not attached or ad- 

 hering to other bodies. 



1 . subrotundum, M. Dunbar, amongst the sand, 



2. lacteum. 3VL In same situation, scarce. 

 $< marginatum;, M. In similar situations, rare* 



