| 11. | "Claspers " are found on the males of cartilaginous fishes.
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| 12. | Males have claspers near the base of the tail.
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| 13. | The pelvic fins are small and angular; the males have pointed claspers.
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| 14. | The claspers of adult males extend beyond the disc.
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| 15. | The pelvic fins are small and angular; males have very long claspers.
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| 16. | The pelvic fins are small, with long, elongate claspers in males.
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| 17. | The pelvic fins are small, with short and elongated claspers in males.
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| 18. | The males claspers are'lancet'shaped, hence the common name.
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| 19. | The pelvic fins of males have rather elongated, blunt-tipped claspers.
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| 20. | The tips of the pelvic fins are rounded; males have thick claspers.
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