Ridley, S. O. ; Dendy, A. 1887. Report on the Monaxonida collected by H. M. S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H. M. S. Challenger, 1873-1876. Zoology 20(59): i-lxviii, 1-275, pls I-LI, 1 map.
