172 PROCEEDINGS OF THE ACADEMY OF [1896. 



(S-interruption=10 mm.) and that the temporal ridge is divided into 

 two parts, the fronto-temporal ridge and the parietal-temporal ridge 

 In a given case (fr. t. r. spinose: pt. r. nil.). The parieto-temporal 

 ridge as it reaches the lambdoidal suture begins to be slightly 

 raised above the plane of the parietal bone and is joined to the 

 occipital bone near the asterion by a harmonic suture ; or, as it 

 reaches the lambdoidal suture it has no influence in changing the 

 serrated character of this line which extends to the asterion in the 

 manner described by writers. In a given case we have (p. t. r. har- 

 monic near A., 3 mm.). The posterior margin of the frontal pro- 

 cess of the malar bone may be produced in a conspicuous process, 

 (the marginal process) or it may be absent. In a given case(marg. 

 pr. trenchant.=5 mm. high). If desirable the height of theprocess 

 could be measured by a line drawn across its base. The interrup- 

 tion of the temporal ridge at the stephanion, the harmonic char- 

 acter of the lambdoidal suture near the asterion, and the large size 

 of the marginal process correlate with the size of the temporal 

 muscle. 



The line of the parieto-squamosal suture at its junction with the por- 

 tioji of the temporal bone back of the squamosa may be marked by 

 a mortise, which answers to the summit of the petrosa as it joins the 

 side of the skull ; thus we have (m.=:3 mm.). 



The term " sconce " is used to express in a general sense the region 

 on the norma verticalis which lies between the parieto-temporal 

 ridges. This diameter at its narrowest part is recorded, in a given 

 instance as (sc. 110 ram.). 



The lower jaw yields at the condyloid process, two facets, the 

 lateral, which articulates with the zygoma, and the median which 

 articulates with the squamosa beneath the brain-case. The median 

 facet is more variable than the lateral and may be horizontal and 

 inclined upward, or horizontal, inclined downward. In a given case 

 (condyl. pr. med. fac. horizontal). The coronoid process may pro- 

 ject at base so far forward as to conceal in whole or in part the 

 third molar when the parts are seen in norma lateralis, or it may lie 

 so far back as to permit the third molar to be seen. In a given case 

 (or. pr. concealing 3 mm.). The mental foramen may be on a line with 

 the first molar, in the interval between premolar and first molar, on 

 the line of the second premolar, or on a line between the first and sec- 

 ond premolar. In a given case (m. f on line of 3 m.). The mas- 

 seteric impression ends on a line answering to the angle of the jaw or 



