About twelve years ago my attention was drawn to some interesting epithelial growths on the head of a cottontail rabbit which was sent to the college by Mr. J. Schuyler Long, who wrote from the Iowa School for the Deaf at Council Bluffs. The head and accompanying letter were referred to Professor H. E. Summers, then head of the Department of Zoology at Iowa State College. The letter reads: "I am sending you a rabbit's head... It has several curious growths which resemble horns. I have killed a great many rabbits but never saw anything like it before. I should be pleased to hear... as to the explanation of this peculiar formation. The rabbit from which the head was taken was caught in a trap by one of our boys. In all other respects it looked like an ordinary rabbit and exhibited no other peculiarities, except that on two places on the body were growths similar in color and texture to these horns, but not pointed. They were about an inch square or a little less, and were raised about 3/4 to 1/2 inch out of the skin."
Proceedings of the Iowa Academy of Science
©1919 Iowa Academy of Science, Inc.
Guthrie, J. E.
"Notes on the Occurrence of Warts on Cottontail Rabbits,"
Proceedings of the Iowa Academy of Science, 26(1), 157-161.
Available at: https://scholarworks.uni.edu/pias/vol26/iss1/20