613 



half-way between the Obelion and the Lambda it has become almost 

 invisible. — Exactly at this spot we find no less than 5 foramina 

 parietalia (see fig. 2), three big ones and two small ones. The 3 big 

 ones form exactly a square with the lower small foramen. The 2""^ 

 small foramen is just below the uppermost big one. The four open- 

 ings formed by the angles of the square are to be sounded and run 

 slantingly through the skull. The fifth foramen is not to be sounded. 

 It is possible that the two small openings are other formations and 

 that they ought not to be considered as belonging to the foramen 

 parietale. Le Double (1) at least seems to doubt the occurrence of 

 a for. par. consisting of more than 3 parts, though the occurrence 

 of 4 and 5 openings at this place has been mentioned before. 

 However 3 parietal openings have been found only 

 rarely. Le Double gives an enumeration of all kinds 

 of cases on page 118 and knows 18 cases of 3 ope- 

 nings on 3204 human skulls. Of these 18 cases 

 there is only 1 agreeing with the abnormality here, 

 viz. that 1 opening is o n the sut. sag. and the 2 

 other openings on the right and on the left beside 

 it, arranged symmetrically. In a wide circumference 

 around these for. par. no other openings are to be 

 found on the parietalia. It is very peculiar however 

 that these 2 small openings are so very near to the 

 3 real for. par. — 



The Lambda suture provided with about ten oss. 

 Wormiana is for the greater part open, only a little 

 grown together on the right and on the left near to the Lambda point. 



Exactly these parts are developed in a crest-like and protruding 

 way. The norma occipitalis also offers some peculiarities. Its surface 

 is very rough, the crests of the lin. nuchae are all strongly developed, 

 the impressions of the muscles of the occiput are deep. The lin. 

 nuch. suprema and superior on the right and on the left form 2 big 

 tubercula (Klaatsch's tori lateralis) at about 4 cm. distance from 

 each other, measured from the 2 highest points. Between these we 

 find a deep impressio occipitalis superior (Waldeyer) = the fossa 

 supratoralis (Klaatsch). The double curve of the lin. nuch. supr. 

 and of the 1. n. sup. is very strong expressed. This double curve is 

 continued as far as the right and the left proc. mastoid, on which it 

 forms sharp crests. The two „Hauptschenkel" ("Waldeyer 2) of the 



Fig. 1. Foramina 

 parietalia. 



