. Bulletin. Natural history. 172 PEABODY MUSEUM BULLETIN 23. Text-fig. 92. Dorsal view of skull o£ Tylosaurus proriger (reconstructed after AMNH 4909, x ca. 1/). Shaft of ischium broad, well expanded medially at symphysis. Distal end of femur much more expanded than proximal; internal trochanter of average proportions and located medially from head. No distinct facets on distal end. Cartilage-capped area of anterior flange of tibia extends two-thirds way up shaft giving bone characteristic broad rectan- gular outline, similar area of posterodistal flange of fibula extends one-third way up shaf
. Bulletin. Natural history. 172 PEABODY MUSEUM BULLETIN 23. Text-fig. 92. Dorsal view of skull o£ Tylosaurus proriger (reconstructed after AMNH 4909, x ca. 1/). Shaft of ischium broad, well expanded medially at symphysis. Distal end of femur much more expanded than proximal; internal trochanter of average proportions and located medially from head. No distinct facets on distal end. Cartilage-capped area of anterior flange of tibia extends two-thirds way up shaft giving bone characteristic broad rectan- gular outline, similar area of posterodistal flange of fibula extends one-third way up shaft. Astragulus nearly circular, dorsal notch between facets for tibia and fibula rudimen- tary or absent. Calcaneum unossified, fourth tarsal small. Metatarsal one expanded. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody Museum of Natural History. New Haven, Peabody Museum of Natural History, Yale University
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