Bull. U. S. B. F., 1924. (Doc. 968.) 
Fig. 40. — Marginal fringe on one of the whalebone plates of a finback whale ( Balaenoptera physalus) from the Gulf 
of St. Lawrence. Natural size 
Fig. 41. — Marginal fringe on one of the whalebone plates of a pollock whale ( Balxnoplcra borealis) from the Gulf 
of Maine. Natural size 
