The posterior fontanelle is entirely wanting ; and this I believe, as the result of a careful examination of many specimens, is the normal condition of the cranium, and not merely at birth, but during the latter months of pregnancy, though exceptions to the rule are to be met with (see last specimen). The existence of this fontanelle is inferred, when the fetal head is examined, from the yielding of the parietal bones, and the firmness of the occipital ; and one is often made when the skull is prepared, if it is not care- fully stuffed. See Medical Journal, Vol. LXVI. p. 457. 1862. Dr. J. B. S. Jackson.
26. Skeleton of a child, from a year to eighteen months old. A ligamentary preparation. 1847. Dr. J. C. Warren.
27. A second preparation, by Dr. Winslow Lewis. The sub- ject was about seven years old. The three lower bones of the sternum are divided upon the median line, whilst those of the last, a younger subject, are not so. 1847.
Dr. J. C. Warren.
28. Imperfect skeleton of a child about fourteen years old ; bones separated by maceration. 1853.
Dr. W. N. Lane, of Charlestown.
29. The same, of a child, about four years old. .1853.
Dr. Lane, of C.
30-1. Upper and lower extremities of a child, from five to ten years of age ; ligamentary. 1847. Dr. J. C. Warren.
32. Cranium of a child, from a year to eighteen months old. 1847. Dr. J. C. Warren.
33. A second, of about the same age. 1861.
Dr. R. M. Hodges.
34. A third, about three or four years old. 1847.
Dr. J. G. Warren.
