Figure 10. Photographic enlargements of thin sectioned chondrophores. The top image shows a section from a specimen that was 139 mm shell length and age 8. The lower image is for a specimen that was 137 mm shell length and age 13. The samples are thin sections viewed with transmitted light but annuli (hyaline zones) are dark bands because the image is photographic negative. (From Ropes and Shepherd 1988.)