448 
locations connected with the Lickey may have occurred subsequently 
to the deposition of the lias, as the faults which have affected that 
formation and the new red sandstone in Worcestershire and Warwick- 
shire appear, he says, to have radiated from the Lickey*. 
4. “ Description of a Model of Arthur’s Seat and the King’s Park, 
Edinburgh,” by J. Robison Wright, Esq., F.G.S. 
This model was constructed on a horizontal scale of ten inches 
to a mile, but for the vertical scale double that: dimension was em- 
ployed, to render the crags perceptible to the eye. The included 
area 1s between two and three square miles, extending from Edin- 
burgh on the west to Duddington on the east, and from Holyrood 
Palace on the north to Prestonfield on the south. The author notices 
in his description the structure and phznomena successively exposed 
in proceeding from Edinburgh eastward ; but as the details have been 
chiefly extracted, with acknowledgment, from Mr. Maclaren’s pub- 
‘lished work on Fife and the Lothians, it is not considered necessary 
to give an abstract of them. 
5. “ Notes by Mr. Maclauchlan, F.G.S., to accompany some Fos- 
sils collected by himself and Mr. Still, F.G.S., during their employ- 
ment on the Ordnance Survey in Pembrokeshire.” 
Taking for a base-line the northern boundary of the Llandeilo 
flags laid down by Mr. Murchison, the author proceeds to describe 
a section extending from near Llanhuadain on the south, to Dinas 
Head on the north. At Potter’s Slade, a little north-west of Llan- 
huadain, a conglomerate dips to the northward, and is traceable 
westward to Ford, and eastward towards Llangan, where a sandstone 
conglomerate occurs containing Trilobites and shells. Proceeding 
on the line of section, the conglomerate is succeeded first by sand- 
stone and sandstone shales, and then at Clarbeston by limestone with 
carboniferous shales, dipping northward, and containing Graptolites 
and casts of shells. Similar carbonaceous shales exist on the west 
of Clarbeston, at St. Catharine’s Bridge, near Camrose; also at 
Rudbaxton, and on the east at Long Ford, near Llandysilio. They 
have in some localities been unsuccessfully worked for coal. Grap- 
tolites have likewise been found in calcareous shales at Robleston, 
about a mile north-west of Camrose. At Llys-y-fran, north of Clar- 
beston, the carbonaceous shales are succeeded by roofing-slates, 
which at Mynydd Castell-bythe (Castell-y-furoch, Ord. Map) and 
Morfel alternate with trap. On the summit of Mynydd Pontfaen, 
sandstone with coarse slates occurs, and between the summit and 
Pontfaen, trap again alternates with slates. The summit of Mynydd 
Llanllawer consists of coarse-grained, rudely columnar greenstone, 
flanked on the northern declivity of the mountain by coarse sand- 
stone of trappean aspect. This rock is overlaid by roofing-slates, 
which extend nearly to Dinas Head, where a hard conglomerate 
sandstone, containing crinoidal remains, is exhibited. All these 
strata are represented in a section as dipping towards the north. 
* See Geol. Trans., 2nd Series, vol.'v. pp. 3338, 335. 
