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Show 1885.] PROF, LANKESTER O N T H E H E A R T OF APTERYX. 479 specimens did actually present the characters of structure in the right cardiac valve which he described and figured. Fortunately Sir Richard Owen's specimens of Apteryx are still in Fig. 3. Heart of Apteryx australis, Ow., with the right ventricle opened as in the C o m m o n Fowl's heart drawn in fig. 1. The muscular band a has the same relations as in fig. 1, but is shorter and broader, owing to the contraction of the specimen in alcohol. The dotted line x indicates the course of the cut which was subsequently made and allowed the reflection of the ventricular wall, as shown in fig. 4. Fig. 4. The same heart as that drawn in fig. 3. The cut along the dotted line x of fig. 3 has been effected, and the ventricular wall with the attachment of the muscular valve reflected. existence and have been exhumed by Dr. Garson from among th,stores of the Museum of the Royal College of Surgeons. Dr. |