Schizodtts Salteri, R. Etheridge, Jun. Pl. II. fig. 19.
Schizodus Salteri, R. Eth., Jun., Ann. & Mag. Nat. Hist. 1875, xv. p. 431, pl. 20. figs. 6–9.
The examples from the Lower Carboniferous of this neighbourhood do not essentially differ from Fifeshire specimens, except perhaps that the concentric striæ are a little less marked.
Loc. and Horizon. In shale with marine fossils at Woodhall, as before. In a shelly ironstone at Drumsheugh, Water of Leith, at Dean Bridge, near Edinburgh; in shale, with other marine fossils, behind West Breakwater, Granton; in ditto at Craigleith Quarry, above the sandstone.
Genus Anthracosia, King.
Anthracosia, King, 1844, Ann. & Mag. Wat. Hist. xiv. p. 313.
Anthracosia? (Unio) nucleus, Brown? Pl. II. fig. 20.
Axinus pentlandicus (pars), Rhind, Age of the Earth, 1836, pl. 2. fig. a.
Pachyodon nucleus, Brown, Ann. & Mag. Nat. Hist. 1843, xii. p. 394, pl. 16[1]. fig. 1.
Unio nucleus, Brown, Fossil Conchology, 1849, p. 178, t. 73. fig. 8.
Obs. I have already pointed out[1] that I believe Dr. Rhind figured two separate species under the name of Axinus pentlandicus. One of these figures (fig. b) is, I think, the shell now known as Schizodus Salteri, mihi. The other (fig. a) was that to which Captain T. Brown gave the name of Pachyodon (or Unio) nucleus. The original locality was Woodhall, Water of Leith. A very ill-preserved shell in Mr. Henderson's collection has, so far as can be ascertained, the general outline of Unio nucleus; but it is impossible, on the characters afforded by it, to give a description of the species.
Loc. and Horizon. In hardened shale, lowest part of the Cement- stone group, quarry on the north side of the Colinton Road, under Craiglockhart Hill, near Edinburgh.
Genus Anthracomya, Salter.
Anthracomya, Salter, 1861, Iron Ores Gt. Britain, pt. iii. p. 229.
Anthracomya scotica, R. Eth., Jun.
Anthracomya scotica, R. Eth., Jun., Geol. Mag. 1877, dec. 2. iv. p. 244, t. 12. fig. 8.
Obs. A few fragments which appear referable to this characteristic fossil are in Mr. Henderson's collection. They are much too fragmentary for description or figuring.
Loc. and Horizon. In black shale of the Wardie series, Water of Leith, at Katesmill, near Slateford, Edinburgh.
