2l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.83 



very small chin eminence ; with a high, strong body ; with a nearly 

 U-shaped dental arch, broad in front and moderately diverging 

 backwards; and with all i6 teeth, moderately worn, of about the size 

 of those in very strong modern mandibles. The third molars are 

 perceptibly smaller than the first and second. 



The lower border of the jaw is broadly and widely flattened for 

 the marked insertions of the digastrics; it is a regular 15-16 mm. 

 broad surface, extending laterally as far as the molar region. An- 

 teriorly, in the middle, the border of this surface bends downward 

 with a dull symphyseal protrusion, which gives to the inferior outline 

 of the jaw a cupid's-bow effect, recalling the similar but more pro- 

 nounced feature in the Mauer mandible. The lingual surface of the 

 bone anteriorly shows only the faint epimedian dull ridge, with bilat- 

 eral shallow depressions above and below, like that seen in the other 

 Krapina jaws. The genial tubercles, as in the other jaws, are low 

 and small, although not beyond the range of modern variation. The 

 mental foramen at left is double, at right large single ; both are 

 located beneath the posterior parts of the first molars. 



Measurements ; cm. 



Height at symphysis 4.0 



Height at M2 ^ 3-35 



Thickness at symphysis 1.55 



Thickness at M2 1.5 



Lower jaw J. — This is the best preserved of the Krapina mandibles, 

 being damaged only at the posterior part of the left ramus. It is at the 

 same time the largest of the jaws. It belonged to an adult male of 

 probably somewhat advancing years. The specimen is marked by 

 its size, breadth, and strength. Like the other Krapina jaws it has a 

 flat, receding symphyseal portion without a chin. The medium broad 

 and high rami are surmounted by strong coronoid processes, a well 

 marked sigmoid notch, and stout, broad, flat, not entirely healthy 

 condyles, especially on the right side. The surface of the condyles 

 has been affected through arthritis. 



The left ramus, well preserved, measures 7.9 cm. in height 

 (Hrdlicka's method), 3.8 in minimum breath. The mandibular angle 

 is close to 1 18°. The border of the angle is rounded, but not more than 

 in modern skulls ; it lacks, as in the other Krapina jaws, the simian 

 aspect that it shows in the La Quina and La Chapelle mandibles. 

 The inferior border is irregularly flattened for the large insertions 



^ All these heights are taken dorsally ; lingually the height is often somewhat 

 greater. 



