Dall, W.H. 1913. On a brackish water Pliocene fauna of the southern coastal plain. Proceedings of the United States National Museum 46: 225-237. Available electronically.
Dall, 1913. Proc. U.S. Nat. Mus. 46: 230, pl. 20, fig. 2.
Dall, 1913. Proc. U.S. Nat. Mus. 46: 230, pl. 20, fig. 6.
Dall, 1913. Proc. U.S. Nat. Mus. 46: 229, pl. 20, figs. 4-5.