636 



figure 1 by a dotted line, it leuelies the parietal (vide figure 1). 

 This is Gruber's "mittelbare Verbindung". Type II shows a regular 

 enlargement of tiie whole squamosal in the direction of the frontal, 

 so, that a fronto-temporal suture is formed. This is Gruber's 'unmit- 

 telbare Verbijidung". A junction of the second type can be cond»iiied 

 with a frontal process of the first type. 



The number of examined skulls is 114: in 47 I found a fronto- 

 temporal sntui-e i. e. in 41,14 7o- 



The skulls of the two diffei-ent kinds are divided as follows. 



In 34 cases we have a frontal process of the first type. In 13 

 cases the two sides of the skull are symmetrical. In 21 the frontal 

 process is only present at one side. 5 of the 13 skulls wiih i^ym me- 

 trical frontal process show a combination of the first and the second 

 type, so that from the fust ty[)e 8 are found with the frontal process 

 on both sides, to 21 with the front. })i-oc. on one side ; which means 

 that the unilateral presence is much more frequent than the bilateral. 



In 13 skulls the second lype was found. Of no less than 12 skulls 

 the two sides were symmetrial and only once I found a unilateral 

 enlargement of the squamosal, which |)roves that the bilateral presence 

 is much more frequent than the unilateral. 



In the unilateral presence of a frontal process of the first type 

 I found this process 13 times on the left side of the skull against 

 6 times on the right one- so the left half of the skull surpasses 

 strongly the right one in this respect. 



An investigation of the pteric region of the side of the skull 

 opposite to a frontal process of the first type led to the following 

 facts : 



I. Processus frontalis at the left side. 



A spheno-parietal suture at the right side in 6 skulls. 

 An OS epiptericum typicum ,, „ ,, ,, ,, 3 

 Several ossa epipterica ,, ,, ,, ,, ,, 1 skull. 

 A temporal proc. at the frontal ,, ,, ,, ,, 1 



II. Processus frontalis + os e[»iptericura at the left side. 

 An OS epiptericum-typicum at the right side in 2 skulls. 

 II Processus frontalis at the right side. 



A spheno-parietal suture at the left side in 2 skulls. 



An OS epiptericum typicum ,, ,, ,, ,, „ 2 



Several ossa epipterica ,, ,, ,, ,, ,, 2 



A spheno-parietal suture is mostly found at the side opposite to 

 the frontal process (in 8 of 19 cases). This suture is not always 

 situated in the same place. Usually it lies at the level of the siitura 



