60 HEALTHY ANATOMY.
620. Thyroid and cricoid ossified. 1851.
Dr. J. B. S. Jackson.
621. Cartilages of larynx and trachea almost completely ossi- fied. 1857. Dr. J. B. 8. Jackson.
622. Trachea ossified. 1851. Dr. J. B. 8. Jackson.
623. Cricoid and part of trachea, ossified. 1847.
Dr. J. C. Warren.
624. Small portion of the trachea of a horse ; in spirit. 1847.
Dr. J. C. Warren.
625. Trachea of a duck, showing the great development of the lower larynx ; and
626. The same, from the peacock, showing, by contrast, the absence of this last. Both specimens show the ossification of the rings, which is normal in birds. 1862.
Dr. J. B. S. Jackson.
627. Humerus of a bird, prepared to show the internal cavity and the openings through which the air is admitted. 1866.
Dr. J. B. S. Jackson.
628. Respiratory system of an insect. (Neppa.) By Auzoux, of Paris. 1851. Museum Fund.
629. Trachea, black ; from a fowl. See No. 243. 1863.
Dr. W. E. Ooale.
II. LUNGS, ETC.
630. Air-cells of the lung of a child ; injected and dried. 1847. Dr. J. 0. Warren. Lymphatics on surface of lung ; injected with mercury. See No. 416.
631. Lungs of a snapping-turtle (No. 179), inflated and dried. By Dr. H. 1855. Dr. 0. W. Holmes.
632. Lung of an iguana, with the arteries minutely injected, distended, dried, and preserved in turpentine. 1847.
Dr. J. 0. Warren.
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