Mucous membrane of the small intestine of Sumatran Rhino. From the report of the dissection in London Zoo, p. 98 fig. 4 in Garrod, A.H., 1873. On the visceral anatomy of the Sumatran rhinoceros (Ceratorhinus sumatrensis). Proceedings of the Zoological Society of London 1873 January 21: 92-104
