The Appendages, Anatomy, and Relationships of Trilobites

by Percy E. Raymond

1903.—On the relationships between the classes of Arthropoda. Proc. Roy. Irish Acad., vol. 24, pp. 320-360, pl. 6.

Castelnau, F. DE.

1843.—Systeme Silurien de l'Amérique Septentrionale, p. 15, pl. 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, pl. 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, pls. 1, 2.

1919.—The evolution of the arthropods and their relatives, with especial reference to insects. Amer. Nat, vol. 53, pp. 143-179.

Dalman, J. W.