Abstract

IN a recent letter in Nature, Prof. Harris1 gave radiological evidence for the appearance of a separate epiphysial centre in the pisiform bone of sub-human primates. In view of the considerable theoretical importance which he attached to this finding, further observations have been made in this Department. A number of female Rhesus monkeys of accurately known age Were available for X-ray study. The result of this investigation has been a smooth anc continuous record of the developing pisiform bone in the macaque monkey from birth to maturity.

References

1. Harris, H. A., Nature, 153, 715 (1944).
2. Quoted from Retterer, Ed., C. R. Soc. Biol., x, 617 (1898).
3. Albrecht, P., Pres. Médic. belge, 42, 9 (1884).
4. Baur, G., Zool. Anz., 8, 326 (1885).
5. v. Bardeleben, K., Proc. Zool. Soc., 354 (1894).
6. Retterer, Ed., G. R. Soc. Biol., x, 435 (1898).