(47) NICHOLSON and LYDDEKER: Manual of Palæontology, 1889, Vol. II., p. 559.
(48) NORMAN, A. M.: "Note on the discovery of Ligidium agile, Persoon (Zia saundersii Stebbing)." Ann. Mag. Nat. Hist. Ser. 4, Vol. XI., p. 419.
(49) NORMAN, A. M.: "British Land Isopoda." Ann. Mag. Nat. Hist. (Ser. 7), Vol. III. (1899), pp. 71-78, pl. VI.
(50) NORMAN, A. M.: Continuation of the last. Vol. XI., 1903, pp. 309-372.
(50a) NORMAN, A.M.: and BRADY C.S.: "British Land Isopoda." Second Supplement Ann. Mag. Nat. Hist. (Ser. 7), Vol. XIV. (1904), pp. 449-450.
(51) PANZER, G. W. F.: Faunæ Insectorum Germanicæ initia, oder Deutschlands Insecten. Parts 1-110, Nurnberg, 1793-1813. (See Koch.)
(52) PANZER, G. W. F.: Continuation by Herrich-Schäffer, Parts 111-190, 1829-1844. (See Koch.)
(53) PARFITT, E.: "The Fauna of Devon." Sessile-Eyed Crustacea. Trans. Devon Assoc. Sci., Sept. 1873.
(54) PERSOON: No paper upon Woodlice by this author is known, but he is quoted in Panzer's Deutschlands Insecten (51), which see.