(20) Archives du Muséum d’Histoire Naturelle de Paris, vol. x. (21) Ibid., vol. viii. (22) An impression on steel: A mode of photographic illustration used by Nièpce de St. Victor, which has since been materially improved. (23) Der Gorilla, etc. A coloured illustration by G. Mützel, plate i. (24) Adventures and explorations in Equatorial Africa (London, 1861). A journey to Ashango Land (London, 1867). The country of the Dwarfs (London, 1872). (25) Reade, Savage Life: being the narrative of a tour in Equatorial, South-Western, and North-Western Africa, etc. (London, 1863). Brehm, Thierleben, edit. i., i. 16. See also Hartmann, Der Gorilla, p. 4. (26) Observations on Du Chaillu’s papers on the new species of mammals discovered by him in Equatorial Africa: Proceed. of the Zool. Soc., London. 1861. (27) Proceed. of the Boston Soc. of Nat. Hist., 1860. See also Du Chaillu’s Adventures and Explorations, chap. 22; and Reichenbach’s Vollständigste Naturgeschichte der Affen (Dresden and Leipzig), p. 196. (28) Description of cranium of an adult male gorilla from the River Danger, indicative of a variety of the great chimpanzee (Troglod. Gorilla): Trans. of Zoolog. Soc., London, vol. iv., 1853. Memoir on the Gorilla (London, 1865): well illustrated. Odontography (London, 1840–45). Article on Teeth, by Todd and Bowman, in the Cyclopedia of Anatomy and Physiology, vol. iv. part ii. Lectures on the comparative anatomy and physiology of Vertebrata (London, 1866–68, vol. iii.). (29) Burton’s Two Trips to the Gorilla land, and the cataracts of the Nile (London, 1876). (30) Compiègne’s L’Afrique Equatoriale (Paris, 1875; Gabonais, p. 260). (31) De Brazza’s Le Tour du Monde, Année 1878, No. 936. (32) Lenz’s Skizzen aus Westafrika (Berlin, 1878), p. 171. (33) Die Loango Expedition, pt. ii., by Falkenstein, p. 149. (34) Koppenfels’ Die Gartenlaube (1877), No. 25. (35) Zoologiska Studier, Andra Häftet. (Lund, 1857). (36) Revue d’Anthropologie (1876), p. 1, etc. (37) The Medical Times, 1872. (38) Descrizione di una scimmia antropomorfa proveniente dall’ Africa centrale, in den Annali del Museo Civico di Genova, i. 53. (39) Studii craniologici sui Cimpanzé. Ibid., iii. 3. (40) Proceedings of the Academy of Nat. Sciences (Philadelphia, 1879), pt. iii. p. 385. (41) On the Appendicular Skeleton of the Primates: Philosophical Transactions (1867), 299. (41A) Macalister’s Muscular Anatomy of the Gorilla: Proceedings of the Royal Irish Academy of Science, 2nd series, vol. i. (42) Ueber die Schädelform des Menschen und der Affen, Leipzig, 1867. (43) Die Hand und der Fuss. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, vol. v. (44) Archiv. für Anthropologie, viii. 67. (45) Abhandl. aus dem Gebiete der Naturwissenschaften, herausgeg. vom Naturwis. Verein zu Hamburg-Altona (Hamburg, 1876), pp. 74–83. (46) Ibid., p. 84, etc. (47) Die anthropomorphen Affen des lübecker Museums (Lübeck, 1876).