^{page 559 note 1} Reprinted from Silliman's American Journal of Science for November, 1901, pp. 362–366Google Scholar.

^{page 559 note 2} Bulletin No. 132 of the United States Geological Survey, 1896Google Scholar.

^{page 561 note 1} Notes on Paleozoic Crustaceans. N.Y. State Museum, Report of the State Paleontologist for 1900. 1901.

^{page 561 note 2} Description of a new genus of the Order Eurypterida from the Utica Slate. Silliman's Journal (3), vol. xxiii, 1882Google Scholar.

^{page 564 note 1} Although Aglaspis was compared with Limnlus by Professor Hall, and its affinities were distinctly stated as with the Merostomata, yet most subsequent writers have overlooked its true relationships and have included it in their lists of trilobite genera. The family named Aglaspidæ was first employed in 1877 by S. A. Miller in “The American Palæozoic Fossils,” p. 208, and the restoration of the family to the Merostomata was first made by the writer in a paper entitled “Outline of a Natural Classification of the Trilobites” (Silliman's Journal (4), vol. iii, p. 182, 1897Google Scholar).

^{page 564 note 2} Read before the British Association, Section C (Geology), Glasgow, Sept., 1901Google Scholar.

^{page 565 note 1} Read before the British Association, Section C (Geology), Glasgow, Sept., 1901Google Scholar.

^{page 567 note 1} Read before the British Association, Section C (Geology), Glasgow, Sept., 1901Google Scholar.

^{page 568 note 1} Read before the British Association, Section C (Geology), Glasgow, Sept., 1901Google Scholar.

^{page 570 note 1} Read before the British Association, Section C (Geology), Glasgow, Sept., 1901Google Scholar.