[232]. The third leg in the male possesses on the fifth joint a curved appendage which extends backwards to the proximal end of the second joint. This structure may have been a clasping organ.
[233]. It has been suggested that the metastoma really belongs to a pregenital segment of the mesosoma which is absent in the adult, but has been found in the embryo of Scorpions.
[234]. Sarle, New York State Museum, Bulletin 69, Palaeont. 9, 1903, p. 1087.
[235]. Beecher, Geol. Mag. 1901, p. 561.
[236]. Peach, Nature, xxxi., 1885, p. 295; Pocock, Quart. Journ. Micr. Sci. xliv., 1901, p. 291; Laurie, Trans. Roy. Soc. Edinb. xxxix., 1899, p. 575.
[237]. Peach, Trans. Roy. Soc. Edinb. xxx., 1882, p. 516.
[238]. Cf. p. 258.
[239]. Nature, xlviii., 1893, p. 104.
[240]. Souvenirs entomologiques, Sér. 9, 1907, p. 229.
[241]. Brauer, Zeitschr. wiss. Zool. lix., 1895, p. 355.