Bull. U. S. H. F.. 1924. i Doc. 968.) 



FlG. 40. — Marginal fringe on one of the whalebone plates of a finback whale (BaUcnnptrra physalus) from the Gulf 



of St. Lawrence. Natural size 



Fig. ii. -Marginal fringe ob one ol the whalebone plates of a pollock whale ( Bala noptera boretUis) from the Gulf 



of Maine. Natural size 



