[B] Cat. Ind. Dec. Crust. Coll. Ind. Mus., part i, fasc. ii (Potamonidæ), 1910.
[C] I include Baluchistan in this territory largely for climatic reasons.
[D] Mr. S. W. Kemp recently obtained at Mangaldai, near the Bhutan frontier of Assam, a single specimen of what may be a species of Fredericella.
[E] See Mem. Geol. Surv. Ind. xxxv (1), p. 39 (1902).
[F] See Ortmann, "The Geographical Distribution of Freshwater Decapods and its bearing upon Ancient Geography," Proc. Amer. Phil. Soc. xli, p. 380, fig. 6 (1902); also Suess, "The Face of the Earth" (English ed.) i, p. 416 (1904).
[G] I am indebted to Mr. W. F. Lanchester for the identification of this species.
[H] The fauna of this lake and of others in the neighbourhood has recently been investigated by Mr. S. W. Kemp. See the addenda at the end of this volume.—June 1911.
[I] "What characters are of systematic importance?" is a question to which different answers must be given in the case of different groups.
[J] I have failed to obtain from the Philadelphia Academy of Science a statement that the type of this species is still in existence.