Note 226 — Chapter X · ARACHNIDA (CONTINUED)—DELOBRANCHIATA = MEROSTOMATA—XIPHOSURA
Reading edition
Packard, “Carb. Xiphos. N. America,” Mem. Nat. Acad. Sci. Washington, iii., 1885, p. 146, pl. vi. fig. 1a, pl. v. fig. 3a (restoration). Williams, Amer. Journ. Sci. (3), xxx., 1885, p. 45. Fritsch, Fauna d. Gaskohle, iv., 1901, p. 64, pl. 155, figs. 1–3, and text-figures, 369, 370.