VIII CONTENTS 



Plate Page 



CXLVI. Skulls of Megacerops acer (type) and doubtfully referred female 894 



CXLVIi. Skulls of Megacerops acer (type) and doubtfully referred female, side view 894 



CXLVIII. Skulls of Megacerops acer (type) and doubtfully referred female, top view 894 



CXLIX. Skulls of Megacerops acer (type) and doubtfully referred female, top view 894 



CL. Skulls of Megacerops acer (type) and doubtfully referred female, front view 894 



CLI. Female skull of Megacerops acer? (t3'pe of Sijmborodon altirostris), palatal view 894 



CLII. Female skull of Megacerops acer? (type of Symborodon altirostris) , palatal view 894 



CLIII. Type skull of Megacerops {"Symborodon") bucco and jaws of Brontops? 894 



CLIV. Type skull of Megacerops {"Symborodon") bucco, palatal view 894 



CLV. Type skull of il/effacerops {"Symborodon") bwcco, top view 894 



CLVI. Skull of Megacerops bucco?, top view 894 



CLVII. Skulls of Menodus, Brontotherium, and Megacerops and a fragment of a humerus 894 



CLVIII. Type jaws of Megacerops riggsi and Menodus torvus, side view 894 



CLIX. Type jaws of Megacerops riggsi and Menodus torvus, top and basal views 894 



CLX. Jaws of Brontops sp. and Megacerops riggsi (type) 894 



CLXI. Skulls of Brontotherium leidyi, side view 894 



CLXII. Skulls of Brontotherium leidyi, top view 894 



CLXIir. Skulls of Brontotherium leidyi, front and palatal views 894 



CLXI'V. Skull and jaw of Brontotherium leidyi, side view 894 



CLXV. Skull of Brontotherium leidyi, palatal view 894 



CLXVI. Type and referred specimens of Brontotherium hypoceras 894 



CLXVII. Type skull of Brontotherium hatcheri, palatal view of skull, front view of horns 894 



CLXVIII. Type skull of Brontotherium hatcheri, top view 894 



CLXIX. Skull referred to Brontotherium hatcheri 894 



CLXX. Skulls of Brontotherium hypoceras?, B. hatcheri, and B. gigas, front view 894 



CLXXI. Type jaw of Brontotherium gigas 894 



CLXXII. Jaws of Brontotherium hatcheri? and B. medium? 894 



CLXXIII. Skull oi Brontotherium gigas elatum, side view 894 



CLXXIV. Skull of Brontotherium gigas elatum, front view 894 



CLXXV. Skull of Brontotherium gigas elatum (type of Titanops elalus), side view 894 



CLXXVI. T^'pe skull of Brontotherium medium 894 



CLXXVII. Skull of Brontotherium curtum 894 



CLXXVIII. Type skull of Bronioi/ieriMm {"Titanops") cwr^Mm, palatal view 894 



CLXXIX. Type skull of Brontotherium {"Titanops") curtum, side view; front view of horns 894 



CLXXX. Type skulls of Brontotheriiim medium and B. curtum 894 



CLXXXI. Skull of Brontotherium platyceras, side view 894 



CLXXXII. Skull of Brontotherium platyceras, top view 894 



CLXXXIII. Skull of Brontotherium curtum and horn of B. hypoceras 894 



CLXXXIV. Skulls of Brontotherium gigas and B. curtum (type) 894 



CLXXXV. Skulls referred to Brontotherium curtum 894 



CLXXXVI. Skulls of Brontotherium curtum (type), B. dolichoceras (tjrpe), and Megacerops? sp 894 



CLXXXVII. Type skull of Brontotherium tichoceras and type horns of B. platyceras 894 



CLXXXVIII. Skull of male Brontotherium platyceras, front view 894 



CLXXXIX. Skull of male Brontotherium platyceras, side view 894 



CXC. Skulls of female Brontotherium? gigas? and B. curtum 894 



CXCI. Type skull of male Brontotherium ramosum 894 



CXCII. Skull of female Brontotherium curtum, palatal view 894 



CXCIII. Skull of female Brontotherium curtum, front and top views 894 



CXCIV. Skull of female Brontotherium curtum, palatal view 894 



CXCV. Atlas of the type of Brontops robustus Marsh 894 



CXCVI. Axis of the type of Brontops robustus Marsh 894 



CXC VII. Fourth cervical vertebra of the type of Brontops robustus Marsh 894 



CXCVIII. Second dorsal vertebra of the type of Brontops robustus Marsh 894 



CXCIX. Tenth dorsal vertebra of the type of Brontops robustus Marsh 894 



CC. Second lumbar vertebra of the type of Brontops robustus Marsh 894 



CCI. Caudal vertebrae of the type of Brontops robustus Marsh 894 



CCII. Second and tenth left ribs of the type of Brontops robustus Marsh 894 



CCIII. Fourth rib of the type of Brontops robustus Marsh 894 



CCIV. Left scapula of the tj'pe of Brontops robustus Marsh 1 894 



CCV. Left humerus of the type of Brontops robustus Marsh 894 



CC VI. Left radius of the type of Brontops robustus Marsh 894 



CCVII. Left ulna of the type of Brontops robustus Marsh 894 



CCVIII. Left scaphoid of the tj'pe of Brontops robustus Marsh 894 



CCIX. Left cuneiform carpi and right pisiform of the type of Brontops robustus Marsh 894 



CCX. Left trapezoid and left magnum of the type of Brontops robustus Marsh 894 



CCXI. Left unciform of the tj-pe of Brontops robustus Marsh 894 



CCXII. Second left metacarpal of the type of Brontops robustus Marsh 894 



CCXIII. Third left metacarpal of the type of Brontops robustus Marsh 894 



