. The Deseado formation of Patagonia . Fig. 73. L. gandryi, view of case of the skull, female (L. oxyhynea)—1/4 natural size; Tym-pamic bullae broken open. lowing two sets of figures illustrate the comparative sizesof the two sexes. Specimen 3335 Specimen 3291X Male Female Skull, greatest length front to back 420 mm. 392 mm Skull, greatest width 252 mm. 236 mm Skull, length of nasal bone 115 mm. 102 mm Skull, length of palate 235 mm. 230 mm LEONTTNIA GAUDRVI 119 The atlas associated with skull No. 3335 is a decidedlyheavy bone in all its proportions. The axis and the thirdcervical were associa
. The Deseado formation of Patagonia . Fig. 73. L. gandryi, view of case of the skull, female (L. oxyhynea)—1/4 natural size; Tym-pamic bullae broken open. lowing two sets of figures illustrate the comparative sizesof the two sexes. Specimen 3335 Specimen 3291X Male Female Skull, greatest length front to back 420 mm. 392 mm Skull, greatest width 252 mm. 236 mm Skull, length of nasal bone 115 mm. 102 mm Skull, length of palate 235 mm. 230 mm LEONTTNIA GAUDRVI 119 The atlas associated with skull No. 3335 is a decidedlyheavy bone in all its proportions. The axis and the thirdcervical were associated with skull No. 329IX, and arelikewise heavy bones. The following are typical meas-urements: Atlas, greatest length Atlas, greatest width Axis, length of centrum and odontoid process Axis, length of odontoid process Axis, width across anterior cotyles Cervical 3, length of centrum Cervical 3, width of posterior end of centrum 86 mm. 170 mm. 132 mm. 34 ram. 98 mm. 66 mm. 55 111!-. Fig 74. Atlas seen from below—r/4 natural Fig. 75. Axis and lervical vertebra, No. 3—1/4size. natural size. While there are other vertebrae in the collection, whichprobably belong to this species, I have not cared to makethe association without some evidence of a definite char-acter. However, in the case of a fore limb, which wasfound fairly near one of the skulls, is of proper size, andbecause this humerus occurs with something like the fre-quency of the skulls, I have been convinced that it belongedto this species, and so described it under the genus. Thisspecimen consists of the two humeri, the radius and theulna, No. 3328. Humerus, greatest length Humerus, diameter of head Humerus, transverse diameter of the shaft Humerus, width of distal end 314 mm. 77 mm. 43 mm. The ulna lacks some 60 mm. in the middle of the shaft,but when fitted to the radius its length can readily be ob- 120 THE DESEADO FORMATION OF PATAGONIA tained. The radius is considerably weathered so thatmeas
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