PLATE XXXIII— continued. 



Figs. 



5 a — e. — Glossograptus armatus, Nicholson — continued. 



5 c. Scalariform view, showing septal spines, described Elles, ' Quart. 



Journ. Geol. Soc.,' 1898, vol. liv, p. 522. Thornship Beck. 



Skiddaw Slates (Ellergill Beds). Sedgwick Museum. 

 5 d. Somewhat distorted specimen, showing long basal spines. Back 



Burn, f mile W. of Nether Cog, Crawick Water. Glenkiln 



Shales. Geological Survey of Scotland, Edinburgh. 



5 e. Distal fragment, bi-profile view. Polmorlach Burn, Dumfries. 



Glenkiln Shales. Ibid. 



6 a — e. — Hallograpt,us mucronatus (Hall). (Page 320.) 



6 a. Characteristic specimen, bi-profile view. Cairn Ryan. Glenkiln 



Shales. Sedgwick Museum. 

 6 b. Distal fragment. Ibid. 

 6 c. Typical specimen. Glenkiln Burn. Glenkiln Shales (zone of 



Nemag. gracilis). Elles' Collection. 

 6d. Smaller specimen. Cairn Ryan. Glenkiln Shales. Sedgwick 



Museum. 



6 e. Scalariform view, showing scopulse. Glenkiln Burn. Glenkiln 



Shales. Lapworth's Collection. 



7 a — c. — Hallograptus mucronatus, var. inutilis (Hall). (Page 322.) 



7 a. Incomplete specimen, bi-profile view. Half mile W. of Bencraff, 



Connemara. Arenig. Muff and Carruthers' Collection. 

 7 b. Distal fragment, showing virgula. Ibid. 

 7 c. Ibid. 

 7 d. Narrower specimen. Ibid. 



7 e. Distal fragment. Ibid. 



8 a — e. — Hallograptus mucronatus, var. bimucronatus (Nicholson). (Page 323.) 



8 a. Typical specimen, bi-profile view. Gairy near head of Garryhorn 



Burn, Carsphairn. Glenkiln Shales. Geological Survey of 



Scotland, Edinburgh. 

 8 6. Long specimen, bi-profile view. Water of Deugh, a few yards 



below the moor. Glenkiln Shales. Geological Survey of 



Scotland, Edinburgh. 

 8 c. Small specimen, bi-profile view. Glenkiln Burn. Glenkiln 



Shales. Lapworth's Collection. 

 8 d. Specimen in scalariform view, showing scopulge. Glenkiln Burn ? 



Glenkiln Shales. Lapworth's Collection. 



8 e. — Distal fragment, scalariform view, showing scopulaB. Polmorlach 



Burn, Dumfries. Glenkiln Shales. Geological Survey of 

 Scotland, Edinburgh. 



9 a — d. — Hallograptus mucronatus, var. nobilis, Elles and Wood, nov. (Page 324.) 



9 a. Well-preserved specimen, bi-profile view, showing septal strand 



and virgula. Burn W.N.W. of Low Glenling, seven miles W. 



by S. of Wigtown. Glenkiln Shales. Geological Survey of 



Scotland, Edinburgh. 

 9 b. Specimen showing proximal end. Ibid. 

 9 c. Long distal fragment, on same slab as 9 b. Ibid. 

 9 '/. Long specimen, sub-scalariform view with scopulaj. Ibid. 



