Publication date: Januari. Publication date from Duncan 1937 [ref. 13606]. Also in Ann. Mag. Nat. Hist. v. 7: 92-94.Duncan, F. M. 1937 (Apr.) [ref. 13606] On the dates of publication of the Society's `Proceedings,' 1859-1926. With an appendix containing the dates of publication of `Proceedings,' 1830-1858, compiled by the late F. H. Waterhouse, and of the `Transactions,' 1833-1869, ... Proc. Zool. Soc. Lond. v. 107 (pt 1) (A): 71-84. From Eschmeyer on the web.