ILLUSTRATIONS IX 



Page 



34. Upper molar of Conor y des co7nma Cope 169 



35. Histogram of length of Ma of Claenodon from the Torrejon of New 



Mexico in the American Museum 178 



36. Tentatively referred specimens of Claenodon ferox (Cope) from the 



Melville (Fort Union No. 3): Left M2, right Mi, left M2-3 and heel of 



Ml, right Mi-3, and left Mi-» 180 



37. Skull and jaws, left side, of Claenodon montanensis (Gidley) 183 



38. Skull of Claenodon montanensis (Gidley), palatal view 183 



39. Foot bones of Claenodon montanensis (Gidley) 184 



40. Left upper jaw of Claenodon silberlingi (Gidley) 186 



41. Hight lower js^yv of Claenodon latidens (Gidley) 188 



42. Left M^~^ of Claenodon vecordensis Simpson 189 



43. Left Ml of iClaenodon sp 189 



44. Right M2-3 of Deuterogonodon montanus (Gidley) 191 



45. Right lower jaw of Prothryptacodon furens Simpson 196 



46. Right lower jaw of Chriacus pugnax Simpson 196 



47. Left Mi-3 of Metachriacus punitor Simpson 198 



48. Right lower jaw of Metachriacus punitor Simpson 198 



49. Left Mi~3 of Metachriacus punitor Simpson 198 



50. Left lower jaw of Metachriacus provocator Simpson 202 



51. Left M2-3 of Metachriacus provocator Simpson 202 



52. Left M'-2 of Metachriacus provocator Simpson 202 



53. Left lower jaw of Spanoxyodon latrunculus Simpson 204 



54. Left lower jaw of Mimotricentes latidens (Gidley) 204 



55. Left lower jaw of Mimotricentes angustidens Simpson 206 



56. Left lower jaw of Didymictis microlestcs Simpson 211 



57. Left P^-M^ of Didymictis microlestes Simpson 211 



58. Left lower jaw of Didymictis tenuis Simpson 212 



59. Referred specimens of Didymictis haydenianus Cope from the Lebo: 



Left upper jaw with carnassial and right upper carnassial 213 



60. Right lower jaw of I ctidopappus mustelinus Simpson 214 



61. Left upper jaw of Ictidopappus mustelinus Simpson 214 



62. Right lower jaw of Ellipsodon aquilonius Simpson 235 



63. Left upper jaw of Ellipsodon aquilonius Simpson 235 



64. Right P4-M3 and right lower jaws of Litaletes disjunctus Simpson 240 



65. Right upper jaw of Litaletes disjunctus Simpson 240 



66. Left lower jaw of Litomylus dissentaneus Simpson 242 



67. Right M'"' of Litomylus dissentaneus Simpson 242 



68. Right lower jaw of Haplaletes disceptatrix Simpson 244 



69. Right upper jaw of Haplaletes disceptatrix Simpson 244 



70. Right lower jaw (with Mi) of Tetraclaenodon symbolicus Gidley 247 



71. Right Mi-2 and right M'^~^ of Tetraclaejiodon symbolicus Gidley 247 



72. Left upper jaw of Gidleyina montanensis (Gidley) 252 



73. Left lower jaw of f Gidleyina silberlingi (Gidley) 254 



74. Ijefi lower ]&w of f Gidleyina superior (Simpson) 255 



75. Left lower jaw of Coriphagus montanus Douglass 260 



76. Left upper jaw of Coriphagus montanus Douglass 261 



77. Right lower jaw of referred specimen of Anisonchus sectorius (Cope) 



from the Lebo 261 



78. Right upper jaw of referred specimen of Anisonchus sectorius (Cope) 



from the Lebo 261 



79. Histogram of length of Mi in Anisonchus sectorius (Cope): Torrejon 



and Lebo specimens 263 



80. Right lower jaw of Pantolambda intermedins Simpson 270 



