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Show 1903.] ON POLYCLADS PROM ZANZIBAR AND BRITISH E. AFRICA. 99 16. DAVENPORT, C. B. " Review of von Guaita's Experiments in breeding Mice." Biol. Bull. 1900, ii. p. 121. [Interesting as a careful attempt to discuss the facts before the Mendelian principles were rediscovered.] 17. D A Y , J. R. Monthly Homceop. Rev. Lond., 1897, xii. p. 148. [Case of albinos from parents who were first cousins.] 18. ' Fancy Mice.' Anonymous. London (Upcott Gill), pp.4, 5. [Contains also Carter Blake's notes, pp. 14-23.] 19. V O N GUAITA. " Versuche mit Kreuzungen von verschiedenen Rassen der Hausmaus." Ber. naturf. Ges. Freiburg-i.-B. 1898, x. p. 317. 20. Ibid. 1900, xi. p. 131. 21. H A A C K E , W . " Ueber Wesen, Ursachen, und Vererbung von Albinismus, &c." Biol. Centralblatt, 1895, xv. p. 45. 22. PICKERING, J. W . " Coagulation in Albinos." Jour. Phys. 1896, xx. p. 310. [Full references.] 23. SELIGMANN, C. G. " A Note on Albinism." Lancet, 1901, lxxx. p. 803. 24. W E L D O N , W . F. R. " Mendel's Laws of Alternative Inheritance in Peas." Biometrika, 1902, i. p. 244. [Refers to Johann von Fischer's testimony.] 25. ' Nature,' 1903, lxvii. pp. 512, 610; lxviii. p. 34. 26. Z O T H , O. " Ein Beitrag zu der Beobachtungen und Versuchen an japanischen Tauzmausen." Arch. ges. Physiol. 1901, lxxxvi. p. 147. [Full references to Cyon, Rawitz, <fcc.l 27. CUENOT, L. " L'Heredite de la Pigmentation chez les Souris." Arch. Zool. exp. (4) 1903, vol. i. no. 3. 28. DARBISHIRE, A. D. " Third Report, &c." Biometrika, 1903, ii. pt. iii. 29. W E L D O N , W . F. R. " Mr. Bateson's Revisions of Mendel's Theory of Heredity." Biometrika, 1903, ii. pt. iii. 4. On the Marine Fauna of Zanzibar and British East Africa, from Collections made by Cyril Crossland in the Years 1901 and 1902.-Turbellaria Polycladida. Part I. The Acotylea. By F. F. LAIDLAW, B.A. Cantab., Assistant Demonstrator and Lecturer in Biology in the Owens College *. [Received May 25, 1903.J (Plate IX.f & Text-figures 3-7.) Mr. Crossland's collection contains, so far as the Acotylea are concerned, specimens of four1 new genera and eight new species out of a total of nine species in all. This high percentage of novelties is not surprising when one remembers that but little is known of * Communicated by the S E C R E T A R Y. f For explanation of the Plate, see p. 113. |