352 Mr. Weaver's Geological Observations on 



stratum of friable, yellowish brown, marly sandstone, surmounting the lias in 

 a nearly horizontal position. It consists of minute grains of quartz with scales 

 of silvery mica, connected by a calcareous medium, and contains indistinct 

 impressions of small bivalves. 



With respect to the organic remains contained in the marly, sandy, and 

 oolitic beds, included under the name of the Lower Oolite, 1 confine myself 

 to the general notice of such as I myself have had an opportunity of observ- 

 ing, or such as I know to have been taken from thence ; referring to the col- 

 lection of the Rev. Dr. Cooke, in which most of the following may be found; 

 of Jish, palates and teeth; of chambered univalves, ammonites, nautilites, 

 belemnites*; of univalves not chambered, trochites, melanites, turbinites, volu- 

 tites, serpulites, patellites ; of bivalves, trigonites, Lutraria gibbosa {Sowerby), 

 astartites, venulites, myacites, modiolites, pinnites, terebratulites, ostracites, 

 pectinites, solenites, cucullffiites, and arcacites ; of echinites, both the body 

 and spines; of the crinoidea, pentacrinites, and the Apiocrinites rotundus ; 

 and of the coralloid tribe, caryophyllites and astreites. Pieces of fossil wood 

 also occur, partly in the state of coal. 



To this list I have to add remains of the Plesiosaurus, found in No. 3. of 

 the beds enumerated above, in Newend quarry, at the foot of Stinchcombe 

 hill ; some blocks of that stone, in the collections of Dr. Jenner and Mr. Shrap- 

 nell jun. of Berkeley, containing vertebrae, portions of the spine, ribs, and 

 other bones apparently belonging to that animal. 



II. NORTH.WEST OF GLOUCESTERSHIRE. 



General Relations. 



§ 31. Beyond the Severn, in the north-west of Gloucestershire, the transi- 

 tion tract re-appears on an enlarged scale, affording a fuller insight into its 

 general structure. It forms a continuous range, which, commencing near 

 Plaxley on the south, passes by Longhope, includes Huntley hill in Glouces- 

 tershire, and May hill in Herefordshire, and thence extending further into the 

 latter county and skirting the north-eastern foot of Perrystone hill (from the 

 summit of which we command one of the finest panoramic views anywhere 

 to be seen), takes its course to the west of north past Marcle hill to Stoke 

 Edith, and expands in the western quarter to Townhope on the Wye. This 



* In the Annals of Philosophy for Dec. 1821, I have stated that orthoceratites also occur in 

 the lower oolite. I have since found the information upon which that statement rested to be 

 incorrect. 



