OF 
1870. ] a (Pepper. 
tissue presents a granular appearance, as if the cancelli of the interspaces 
were not solidly filled up. The process of sclerosis not infrequently dips 
down like a cone whose base is of considerable extent at the surface of 
the new growth and whose apex just touches, or is sometimes welded with 
the original compact tissue. (Fig. 21.) Eburnation has nowhere taken 
place. 
The original bone, too, has undergone marked changes. Its limits are 
generally pretty well defined, but the compact tissue of which its wall 
once consisted, is now cancellated, to a greater or less degree (osteo-spon- 
giosis). Sometimes all appearance of compact tissue, save a mere worm- 
eaten porous external film, has disappeared. Sometimes no cancellation 
appears, but the old and new growths are welded together. The cancelli 
of the once compact tissue of the old bone always run parallel with the 
aais of the bone, and are thus easily distinguished from those of the spaces 
between the laminz of the new growth which run at right angles to the 
surface of the bone. (Figs. 4 and 17.) The old cancellated tissue has 
often very large cancelli and in some cases has disappeared, leaving a 
wider medullary canal than is normal. 
The epiphyses do not appear materially altered on section. 
V. Description OF INDIVIDUAL BONES. 
1. Head.—All the bones of the head are present, completely disarticu- 
lated. The spheno-occipital suture was not ossified. No sections were 
made of these bones, and the external appearances alone are described. 
(a) Frontal. The roof of the orbit, especially in the fosse for the 
lachrymal glands, is somewhat porous. Internally the porosity appears 
over various parts of the perpendicular portion. The irregular striated 
appearance from large numbers of fine grooves is marked, and sclerosis 
seems to have made considerable progress. 
(b) Parietal. Externally slightly porous at the posterior border ; in- 
ternally also over, say one-fifth of the surface, corresponding to the 
protuberance. 
(ec) Occipital. Externally small scattered patches of porosity ; inter- 
nally the same change is limited to the superior fosse and the groove for 
the left lateral sinus. 
(d) Sphenoid. Porosity of external surface of greater wings, and also 
in most of the pterygoid plates, which are somewhat thickened. 
(e) Temporal. Slightly porous and thickened externally on squamous 
portion, and in the glenoid cavity and in the grooves for both lateral 
sinuses. 
(f) Sup. Max. Slightly porous on anterior surface, and at the tuber- 
osity. The alveoli are reticulated so as to resemble almost the meshes of 
the pulmenary structure. 
(g) Palate. Internally, slight porosity at the junctlon of the perpen- 
dicular and horizontal portions. 
(h) Inf. Max. Ascending ramus markedly thickened, and porous in- 
ternally and externally ; most developed at the centre of the ramus ; 
Avr Sia Vv Ob Sil 1) 
