A. M.  Norman, ?Notes on the natural history of east Finmark. Polyzoa.?, Ann. Mag. nat. Hist., vol. Ser. 7,12, pp. 87-128, 1903.

A. M.  Norman, ?Notes on the natural history of east Finmark. Polyzoa.?, Ann. Mag. nat. Hist., vol. Ser. 7,11, pp. 567-598, 1903.