622 HISTORICAL GEOLOGY. 



Psilophyton princeps Dn.*t(Fig. 854, page 583), Lepidodendron Gaspianum Dn.,(Fig. 

 855), Sigillaria palpebra Bn., Stigmaria perlata Dn., Cordaites Bobbii t (Fig. 896), A7-chce- 

 opteris Jacksoni (Figs. 898, 899), Neuropteris polymorpha Dn. (Fig. 897), N. Dawsoni 

 Hartt (leaflet over six inches long), Sphenopteris Uitchcockiana Dn., S. Hceninghausi 

 Brngt., S. Hartti Dn., CalUpteris pilosa Dn., HymenophyllUes Gersdorfi Gopp., H. 

 ohtusilohus Gopp., Alethopteris discrepans Dn., Pecopteris preciosa Hartt, species of 

 2'ricJwmanites, Calamites radiatus Go])]^. (Fig. 900), C . cannceformis Schlotheim, Astero- 

 phyUUes acmilaris Dn., A. latifolius Dn. (Fig. 901), Sphenop>hyllnm antiquum Dn. ; 

 Badoxylon Ouangondianum Dn., besides fruits of Gymnosperms, of the genera Cardio- 

 carpus and Trigonocarpus. 



A Gymnosperm fossil wood, from Schoharie County, N.Y., has been named Or- 

 moxyloii Erianum by Dawson. At Perry, Me., occur Lepidodendron Gaspianum Dn., 

 Leptophlceum rhombicum Dn., Archceopteris Jacksoni Dn., A. Halliana, A. Bogersi 

 Dn-jA. {Cyclopteris) BroiuniDw., Caulopteris Lockiooodi Tin.., Anarthrocanna Perryana 

 Dn., Stigmaria pusilla Dn., and others, there being very few of the St. John species. 

 Some species are the same that occur in Subcarboniferous beds. See, for descriptions of 

 plants, in addition to Dawson's publications, also C. F. Hartt in Bailey's New Brunswick 

 Geol. Bep., 1865 ; Lesquereux, Beport on Coal Flora of Pennsylvania, and another on 

 Indiana; Newberry's Ohio Beports, and other publications, etc. 



FOREIGN. 



The Devonian beds in the British Isles comprise the Old Eed sandstone 

 of Scotland; the same in southeastern Wales and the adjoining region of 

 Herefordshire in England, and of some parts of Ireland ; and areas of slates 

 and limestone in Devon and Cornwall, or southeastern England. The f ossil- 

 iferous Devon areas suggested the name for the beds. 



The more northern of the Scottish areas (a) stretches in a south- 

 southwest direction, from the Shetland and Orkney Islands, along the tvest 

 coast of Scotland into Loch ISTess ; it has for part of its western boundary 

 the northern Highland Archaean region of Scotland — along which must 

 have run a western shore-line in the Devonian sea. (6) Nearly parallel 

 with this northern area, another crosses central Scotland from Stoneham to 

 the Firth of Clyde; and farther south, beyond a Carboniferous belt, is still 

 another interrupted line ; and this central trough of chiefly Devonian and 

 Carboniferous rocks, about 50 miles wide, is in the line of the area of Car- 

 boniferous beds (mostly Subcarboniferous), and outcrops of Devonian, which 

 occur over western Ireland, (c) A third area is that of eastern Wales 

 and the country adjoining; it has the Siluro-Cambrian region of Wales as its 

 western border ; and its continuation southwestward embraces the Carbonif- 

 erous area of South Wales ; thence, the combined Devonian and Carboniferous 

 area extends over Devon and Cornwall. The northeastward and eastward 

 continuation of this third area to the North Sea is under the cover of Triassic 

 and later rocks, except where Carboniferous beds outcrop. Borings have 

 been supposed to prove the presence of Devonian shales and sandstone to 

 the eastward, under London, at a depth of about 1000 feet, Etheridge 

 identifying the fossils Spirifer disjunctus, Bhynchonella cuboides with species- 

 of Orthis, Chonetes, and Edmondia. 



