Note 225 — Chapter X · ARACHNIDA (CONTINUED)—DELOBRANCHIATA = MEROSTOMATA—XIPHOSURA
Reading edition
The British fossil forms of this group are described and figured by H. Woodward, “Monograph of the Merostomata,” Palaeontogr. Soc. 1866–78, and Geol. Mag. 1907, p. 539.