Dall, W. H. (1924). Supplement to the report of the Canadian Arctic expedition. Mollucan recent and Pleistocene. In: Chipman, K.G.; Cox, J.R.; O'Neill, J.J. (Ed.) Report of the Canadian Arctic Expedition 1913-18. Volume VIII. F. A. Acland, Ottawa, pp 31a-35a, pl. 4.