G. Poulett Scrope — On Pretended Raised Beaches. 535 



There can be no reasonable doubt of the vegetable nature of tliis 

 fossil, and I think its affinity to the vascular Cryptogams is most 

 clearly shewn. 



These Lower Arenig Eocks, from whence the specimen was ob- 

 tained, rest apparently quite conformable on Upper Lingula-flags,^ and 

 underlie the true Arenig or Skiddaw rocks. Nearly all the species ob- 

 tained from these beds are new, and they indicate a fauna intermediate 

 between Tremadoc Rocks, and the true Arenig Kocks. Indeed, in 

 the report to the British Association, by Mr. Salter and myself, in 

 1866, they were classed as Tremadoc Eocks ; but I have since 

 thought it advisable to separate them and to place them in an inter- 

 mediate position. The Brachiopoda from these rocks have been de- 

 scribed by Mr. Davidson (Geol. Mag., Vol. V. p. 303), but all the 

 other species are yet undescribed. 



Eophjton (.?) explanatum, n.sp., Fig. 1. PI. XX. — A raised, mode- 

 rately convex stem, about 4 lines in breadth ; widening, however, 

 and becoming somewhat compressed at the joints. The surface is 

 ribbed, and fvirrowed along its whole length. At the lower joint (a) 

 the ribs bend outwards, evidently to form a branch. The joint is 

 obliquely placed, widened out, and its course distinctly marked 

 by a deep sulcus. The cortical substance is very thin, and can be 

 removed to shew the internal structure. The internal structure is 

 made up of compressed columns, running the whole length from 

 joint to joint, evidently of a tubular nature, and bound together 

 by very thin tissue. These are well shewn at b. At c, being the 

 base of the stem, the broken ends are visible. Figs, d and e are 

 these parts magnified. 



Fig. 2 most likely belongs also to this plant, but the characters are 

 not well marked. 



Unless Eophyton lAnnoeanum is proved to have a jointed stem, and 

 an internal structure similar to our specimen ; it will probably be 

 necessary to make a generic distinction, but at present it is better to 

 retain this under Dr. Torell's generic name. 



III. — On THE Pketended "Raised Sea-Beaches" of the Inland 

 Slopes of England and Wales. 



By G. Poulett Scrope, F.R.S., F.G.S., etc. 



IN the number of this Magazine for July, 1866, p. 293, I ventured 

 to characterize as " preposterous," the opinion advanced by ]\Ir. 

 D. Mackintosh in two preceding papers (Geol. Mag., Vol. III. p. 69, 

 and p. 163) that the very numerous terraces that occur on the sides 

 of the Chalk and Oolitic hills of the southern and western counties 

 were, "without doubt, raised Sea-hcaclies," affording, therefore, 

 evidence of the very recent elevation of these hills from beneath the 

 sea- level, since the complete excavation of the existing valleys. 



^ So marked in the Geological Survey Maps. I am inclined, however, to think 

 that they are representatives of the Tremadoc rocks, for Linff. Darisii. which is the 

 only fossil present, is equally characteristic of Tremadoc rocks, and reaches here also 

 into these Lower Arems: rocks. 



