May, 1919 SOME NOTES ON THE EGG OF .4EPYORNIS II.4XIIIUS 101

size; until additional material is brought to light, the dimensions of the Aepy- ornis must remain problematic." For assistance in the preparation of this article and the displacement Fig. 23. AEPYORNIS EGG, SAiiE AS SHOWN IN FIG. 21, RUT OPPOSITE SIDE, SHOWING EXTRAN- EOUS CONCRETIONS PROBABLY DERIVED FROM GROUND ON WHICH IT LAY. measurements showing the relative size of different eggs, as well as for pho- tographs, I am indebted to Mr. J. D. Figgins, Director of the Museum. Denver, Colorado, March 1, 1919.