Harry Govier Seeley,
Quarterly Journal of the Geological Society of London
(1877)
“ On each side of the base, between this ridge and the rib, is a large impressed crescentic area. The transverse width of the base of the centrum external to the ribs is 27/8 inches. The bases of the ribs are strong, elevated, and directed chiefly downward. The sides of the centrum are smooth, concave from front to back, and moderately convex from above downward, and extend vertically for 1 inch above the ribs; the neural arch is confluent with the centrum, and unites with it by a large compressed squamose base, which fits into an impressed concave area. ”
