In 1929 Dr. E. L. Rippy presented the Biology Department of Southern Methodist University with several ungulate skulls found near Kerrville, Texas. The writer noticed that one male horse skull has the left maxillary first molar extremely elongated, projecting twenty-eight millimeters beyond the normal distance between the fourth premolar and the second molar in the form of a wedge.
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"Abnormal Dentition in the Horse,"
Field and Laboratory: Vol. 8
Available at: https://scholar.smu.edu/fieldandlab/vol8/iss2/4