PLATE XIX. 



Genus Nemagraptus (Ccenograptus, Hall), Emmons. 



1 a—f. — Nemagraptus gracilis (Hall). 



1 a. Very large specimen, -well preserved, partly in low relief. Bail Hill, Sanquhar. Glen- 



kiln Shales. Geological Survey of Scotland, Edinburgh Museum. 

 1 b. Typical form. Figured, Lapworth, Cat. West. Scott. Foss., 1876, pi. iii, fig. 65. 



Glenkiln Burn. Glenkiln Shales. Lap-worth's Collection. 

 1 c. Specimen showing sicula. Berrybush Burn, St. Mary's Loch, Selkirkshire. Glenkiln 



Shales. Geological Survey of Scotland, Edinburgh Museum. 

 1 d. Specimen preserved in low relief. Spy Burn, Shropshire. Borrington Flags. H.M. 



Geological Survey Collection. 

 1 e. Portion of large specimen. Belcraig Burn. Glenkiln Shales. Elles' Collection. 



1 /. Specimen preserved in low relief. Spy Burn, Shropshire. Eorrington Flags. H.M. 



Geological Survey Collection. 



2 a—d. — Nemagraptus gracilis, var. surcularis (Hall). 



2 a. Typical form. Figured, Lapworth, Cat. West. Scott. Foss., 1876, pi. iii, fig. 64. 



Cairn Hill, Euchan Water, nr. Sanquhar. Glenkiln Shales. Lapworth's Collection. 

 2 b. Two specimens in close association. Ibid. 

 2 c. Small specimen, showing the apertural spine of the sicula. Glenkiln Burn. Glenkiln 



Shales. Lapworth's Collection. 



2 d. Elongated specimen. Belcraig Burn. Glenkiln Shales. Lapworth's Collection. 



3 a — 7i. — Nemagraptus gracilis, var. remotus, Elles and Wood, nov. 



3 a. Part of a slab, showing numerous specimens in association. Bein Gill, Wandel 



Water, Lanarkshire. Glenkiln Shales. Geological Survey of Scotland, Edinburgh 



Museum. 

 3 b. Specimen on same slab as fig. 3 a. 

 3 c. Ditto ? On same slab as figs. 3 a and 3 b. 

 3 d. Characteristic form, well preserved. Cairn Hill ? Glenkiln Shales. Lapworth's 



Collection. 

 3 e. Specimen showing general form, poorly preserved. Belcraig Burn. Glenkiln Shales. 



Wood"s Collection. 

 3/. Fragment of larger specimen. Ballygrot, co. Down. Glenkiln Shales. Lapworth's 



Collection. 

 3 g. Large specimen, but with few branches. Morrach Bay, Portpatrick. Glenkiln Shales. 



Geological Survey of Scotland, Edinburgh Museum. 



3 Ji. Specimen showing only one branch. Morrach Bay, Portpatrick. Glenkiln Shales. 



Geological Survey of Scotland, Edinburgh Museum. 



4 a — d. — Nemagraptus gracilis, var. nitidulus (Lapworth). 



4 a. Portion of a slab, showing three specimens in association. Cairn Hill, Euchan Water. 



Glenkiln Shales. Lapworth's Collection. 

 4 b. ? Type specimen. ? Figured, Lapworth, Cat. West. Scott. Foss., 1876, pi. iii, fig. 66. Ibid. 

 4 c. Small specimen. Belcraig Burn. Glenkiln Shales. Lapworth's Collection. 

 4 d. Large specimen, poorly preserved. Birnock Water, Abington. Glenkiln Shales. 

 Lapworth's Collection. 

 5. — Nemagraptus, sp. 



Well-preserved specimen, showing pendent form of the stipes. Craiglure Lodge, Head 

 of Stinchar. Glenkiln Shales. Geological Survey of Scotland, Edinburgh Museum. 



6 a — c. — Nemagrajitus explanatus (Lapworth). 



6 a. Type specimen. Figured, Lapworth, Cat. West. Scott. Foss., 1876, pi. iii, fig. 68. 



Glenkiln Burn. Glenkiln Shales. Lapworth's Collection. 

 6 b. Specimen showing the sicula. Cairn Hill ? Glenkiln Shales. Lapworth's Collection. 



6 c. Fragment with two branches. On same slab as fig. 2 c. 



7 a—f. — Nemagraptus explanatus, var. pertenuis (Lapworth). 



7 a. Type specimen. Figured, Lapworth, Cat. West. Scott. Foss., 1876, pi. iii, fig. 67. 



Birnock Water, Abington. Glenkiln Shales. Lapworth's Collection. 

 7 b. Fragmentary stipe. Ibid. 



7 c. Specimen showing sicula. Cairn Hill. Glenkiln Shales. Lapworth's Collection. 

 7 d. Single straight stipe with sicula well shown. Glenkiln Burn ? Glenkiln Shales. 



Lapworth's Collection. 

 7 e. Ditto. On same slab as fig. 2 a. 

 7 f. Two specimens strongly flexed. Bein Gill, Wandel Water, Lanarkshire. Glenkiln 



Shales. Geological Survey of Scotland, Edinburgh Museum. 



