National Geographic : 1949 Jul
© National Geographic Society 56 Kodachrome by Rutherford Platt Found in America Only on the Pacific Coast Is the Ear Shell Called Abalone in California The red inner layer is revealed at top, after the outer covering at left has been removed. Holes are for breathing. Mother-of-pearl lining is pictured at right. Monterey Bay produced in one year 3,000.000 pounds of abalone.