2 6 KANSAS UNIVERSITY QUARTERLY. 



and narrower ramus of the lower jaw, the less anteriorly produced 

 flange of the angle, the greater depth below the molars, the more 

 protuberant chin, etc. However, a more accurate idea of the differ- 

 ences or resemblances will be obtained by the comparison of the 

 measurements given by Leidy. In the following table I give in the first 

 two columns the measurements of Leidy's adult (i) and young (2); 

 in the third those of an adult female of our specimens (3); in the 

 fourth of an adult male (4); in the fifth and sixth of young skulls 

 (5, 6); and in the last two (7, 8) those of the oldest skulls in the 



collection: 



1 2 3 4 5 « y s 



Length of skull from top of inion to 



end of nasals in median line .... 292 304 294 294 315 304 . . 



Length from anterior margin of fora- 

 men magnum to end of premaxil- 

 laries 268275260 



Breadth at postorbital processes... 15 113 109 100 115 127 128 



Breadth of face at middle of zygomas T35 123 132 105 .. 163 135 .. 



" " " lachrymal eminences 103 93 94 79 85 113 100 .. 



Height of supraorbital margin from 



a level 105 108 115 78 100 113 in . . 



Height of face at infraorbital foramen 82 .. 84 65 .. .. 82 .. 



Height of face at middle of canines 63 .. 58 .. 54 .. 60 .. 



Width of face at first premolar 38 36 40 40 40 42 44 .. 



Width of face at canine alveoli ... . 69 58 74 55 59 89 75 .. 



Width of premaxillaries 29 33 49 43 45 52 45 .. 



Depth of zygoma from end of post- 

 orbital process to end of pregle- 



noid process 69 62 68 52 . . 75 76 . . 



Depth of zygoma at middle below 



the orbit 36 t,2 32 32 .. 53 40 .. 



Length of temporal fossae from inion 



to postorbital process '.... 80 80 82 77 80 75 82 



Height of inion 94 89 So 85 71 



Breadth of upper part of inion.... 60 54 55 52 58 67 57 .. 



Breadth at the glenoid fossae 125 116 127 112 122 140 126 . . 



Height of occipital foramen 28 27 .. 25 22 20 



Breadth of occipital foramen 26 26 26 23 21 26 .. 



Distance between the ends of the 



paroccipital processes 50 52 56 56 49 60 .. 



Width between the molars of the two 



sides 21 21 22 22 24 26 24 .. 



Length of molar series 73 80 75 .. 71 71*80 .. 



Length of hiatus in advance of latter 44 48 52 45 46 47 52 .. 



Height of canine tuberosity 39 30 44 26 31 48 40 .. 



Length of mandible from condyle 



to symphysis 2 20 223 226 197 215 220 232 222 



Height of mandible at the condyle 74 74 96 84 81 120 95 98 



Height of mandible at the coronoid 



process 83 84 no 90 88 125 104 106 



