164 THE APPENDAGES, ANATOMY, AND RELATIONS OF TRILOBITES. 
Bernard, H. M. 
1892. — The Apodidfe. 
1893. — Trilobites with antennae at last! Nature, vol. 48, p. 582. 
1894. — The systematic position of the trilobites. Quart. Jour. Geol. Soc., London, vol. 50, 
-pp. 4H-434. text figs. 1-17. 
1895 A. — The zoological position of the trilobites. Science Prog., vol. 4, pp. 33-49. 
1895 B. — Supplementary notes on the systematic position of the trilobites. Quart. Jour. 
Geol. Soc, London, vol. 51, pp. 352-360, figs. A-C. 
Beyrich, E. 
1846. — Untersuchungen ueber Trilobiten. 2. Stuck, p. 30, pi. 4, fig. ic. 
Billings, E. 
1870. — Notes on some specimens of Lower Silurian trilobites. Quart. Jour. Geol. Soc, 
London, vol. 26, pp. 479-486, pis. 31-32. Abstract in Geol. Mag., vol. 7, p. 
291, and Nature, vol. 2, p. 94. 
Brongniart, A. 
1822.- — Histoire naturelle des crustaces fossiles. Paris. 
Brunnich, F. E. 
1 781. — Beskrivelse over trilobiten, en dyreslaegt og dens arter, med en ney arts aftegning. 
Nye Samlig of det Kong. Danske Vidensk. Selskabs. Skriften, Copenhagen. 
Burling, L. D. 
191 6. — Peedeumias and the Mesonacidse, with description of a new species, having at least 
44 segments, from the Lower Cambrian of British Columbia. Ottawa Nat., 
vol. 30, pp. 53-58, pi. 1. 
1917. — Was the lower Cambrian trilobite supreme? Ibid., vol. 31, pp. 77-79, text figs. 1-2. 
Burmeister, H. 
1843. — Die Organisation der Trilobiten. Berlin. 
1846. — The organization of trilobites, deduced from their living affinities. Eng. transla- 
tion, Ray Society, London. 
Calman, W. T. 
1909. — Crustacea, in "A treatise on zoology," edited by Sir Ray Lankester. London. 
1919. — Dr. C. D. Walcott's researches on the appendages of trilobites. Geol. Mag., dec. 
6, vol. 6, pp. 359-363, pi. 8, text fig. 1. 
Carpenter, G. H. 
1903. — On the relationships between the classes of Arthropoda. Proc Roy. Irish Acad., 
vol. 24, pp. 320-360, pi. 6. 
Castelnau, F. de. 
1843. — Systeme Silurien de l'Amerique Septentrionale, p. 15, pi. 2, figs. 1, 4. 
Clarke, J. M. 
1888. — The structure and development of the visual area in the trilobite, Phacops rana 
Green. Jour. Morph., vol. 2, pp. 253-270, pi. 1. 
Crampton, G. C. 
1916. — The phylogenetic origin and the nature of the wings of insects, according to the 
paranotal theory. Jour. New York Entomol. Soc, vol. 24, pp. 1-39, pis. I, 2. 
