BIBLIOGRAPHY. 

 AGASSIZ, L. 



1873. Discovery of the basal joint of legs of trilobites. Amer. Nat., vol. 7, pp. 741-742. 



ANGELINA N. P. 



1854. Palasontologia Scandinavica, pars i, Crustacea formationis transitionis. 



AUDOUIN, J. V. 



1821. Recherches sur les rapports naturels qui existent entre les trilobites et les animaux 



articules. Ann. Gen. Sci. Phys. Nat. Bruxelles, vol. 8, p. 233, pi. 26. 

 1822. Isis (Encycl. Zeitung), Oken., vol. 10, p. 87, pi. i, No. 4, figs. 1-5. 



BARRANDE, J. 



1852,. Systeme Silurien du centre de la Boheme, vol. i, pp. 226-230, and 629, pi. 30, 



figs- 38, 39- 

 1872. Ibid., vol. i, Suppl., p. 180, pi. 4. 



BARTH, HERMANN VON. 



1875. Die Stellung der Trilobiten in zoologischen Systeme. Das Ausland, 26. Jahrg., 



P- 2 5- 

 BEECHER, C. E. 



1893. On the thoracic legs of Triarthrus. Amer. Jour. Sci. (3), vol. 46, pp. 367-370, 



467-470, text figs. 1-3. 



1894 A.- On the mode of occurrence, and the structure and development of Triarthrus 

 becki. Amer. Geol., vol. 13, pp. 38-43, pi. 3. 



1894 B. The appendages of the pygidium of Triarthrus. Amer. Jour. Sci. (3), vol. 47, 



pp. 298-300, pi. 7, text fig, i. 



1895 A. Further observations on the ventral structure of Triarthrus. Amer. Geol., vol. 



15, pp. 91-100, pis. 4-5. 



1895 B. Structure and appendages of Trinucleus. Amer. Jour. Sci. (3), vol. 49, pp. 

 307-311, pi. 3. 



1895 G The larval stages of trilobites. Amer. Geol., vol. 16, pp. 166-197, pis. 8-10. 



1896 A. The morphology of Triarthrus. Amer. Jour. Sci. (4), vol. i, pp. 251-256, pi. 



8; Geol. Mag., dec. 4, vol. 3, pp. 193-197, pi. 9. 



1896 B. On a supposed discovery of the antennas of trilobites by Linnaeus in 1759. Amer. 



Geol., vol. 17, pp. 303-306, text figs. 1-3. 



1897 A. Outline of a natural classification of trilobites. Amer. Jour. Sci. (4), vol. 3, pp. 



89-106, 181-207, pi. 3. 

 1897 B. Remarks on Kingsley's "Systematic position of the trilobites." Amer. Geol., 



vol. 20, pp. 38-40. 

 1900. Trilobita. Eastman-Zittel Text-book of Paleontology, vol. i, pp. 607-638, text 



figs. 1261-1331; ed. 2, 1913, p. 700. London. 

 1901. Structure and development of trilobites. In "Studies in Evolution," pp. 109-225. 



New York and London. 

 1902. The ventral integument of trilobites. Amer. Jour. Sci. (4), vol. 13, pp. 165-174, 



pis. 2-5, text fig. i; Geol. Mag., dec. 4, vol. 9, pp. 152-162, pis. 9-11, text 



figs. 1-8. 



