A. E.  Shipley, ?Sipunculoidea, with an account of a new genus Lithacrosiphon?, in Fauna and geography of the Maldive and Laccadive Archipelagoes, J. S.  Gardiner, Ed. Cambridge: University Press, 1902, pp. 131-140.

J. S.  Gardiner, ?The fauna and geography of the Maldive and Laccadive Archipelagoes?, ?, vol. ?, pp. 334-340, 1902.