40 



THE GEOLOGIST. 



We shall be obliged by communications, and strati grapbical lists of 

 fossils from our readers and correspondents, to assist us in our labours in 

 determining this interesting point of Whether the ordinary division into 

 "white chalk with flints," and "white chalk without flints," is not merely 

 a mineralogical division, and not a proper geological subdivision cha- 

 racterized by distinctive organic remains, and marking out a positive zone 

 in the succession of geological events and of life-forms ; or Whether a dis- 

 tinguishing alteration in the organic remains of the white chalk does not 

 happen so near the horizon of cessation of flint layers, that by including or 

 excluding some few beds of chalk, those valuable and characteristic petrolo- 

 gical features (of chalk with, or without flints) may not be made more pre- 

 cisely valuable and definite than at present, S. J. Mackie. 



LowEE SiLUEiAN FossiLS AT BuiLTH. — The neighbourhood of Builth 

 affords excellent specimens of many of the Lower Silurian fossils, espe- 

 cially trilobites. It may be useful to inform amateur and professed geolo- 

 gists that the little town of Builth contains a good practical geologist in 

 the person of Mr. John Jones, gardener at Pencarrig House, who, though 

 in humble circumstances, possesses a capital knowledge of the fossils of 

 the district, and the localities where they may at once be found. He is 

 willing at all times, so far as liis duties permit, to become the pioneer of geo- 

 logical visitors at Builth, and will, for a suitable consideration, forward spe- 

 cimens to correspondents. Several amateurs of high standing, as well as 

 professors, have availed themselves of his knowledge to the enriching of 

 their collections. Within the kst twelve months I have received from 

 him some excellent specimens of Trilobites {Ogygia Biichii, Ampyx 

 nudus, Trinucleus concentriciis, etc.), also specimens of Didymograpsus, 

 Gra/piolithus, Hastrites, etc. I make this statement that others wishing 

 to have their collections of Lower Silurian remains added to, may know 

 w^hither to look for aid. — A Leominster Subsceibee. 



Mammalian Eemains. — In the ' Philosophical Transactions ' for 1715, 

 vol. xxix., two teeth of Elephas, probably E. antiqiius, are recorded to 

 have been found in the north of Ireland, at Magherj^ eight miles from 

 Bulturbet, in digging the foundation of a mill near the side of a small 

 brook that parts the counties of Cavan and Monaghan. They were about 

 4 feet underground, and about 80 yards from the brook. The bed on 

 wliich they lay had been laid with ferns, and with that sort of rushes here 

 called "sprits," with which brushes and nut-shells were intermixed. 

 Under this was a stiff* blue clay, on which teeth and bones were found. 

 Above this was, first, a mixture of yellow clay ; under that a fine white 

 sandy clay, which was next to the bed. The bed was, for the most part, 

 a foot thick, cutting like turf ; and in every la3^cr the seed of the rush was 

 as fresh as if new pulled. 



In the ' Philosophical Transactions ' for 1754, vol. xlviii., there is a 

 record of several bones of an elephant found at Leysdown, in the island 

 of Shcppey, by Mr. Jacob, surgeon, of Favcrsham. Three or four years 

 before, Mr. Jacob luul sent tlie acetabulum of an elephant, which was dis- 

 covered stickiiig in the clay ^^ hi('h as ])artly washed away from the cliff, 

 about a mile eastward of the cliffs of Minster. This, with other parts — ■ 

 vertebrae, a tliigh-bone 4 feet long, too rotten to be taken up entire — all 

 lay below higli-AA ater mark ; and as the place soon after became his property 

 by ])urchase, he then went, attended by some workmen, in search of more 

 relics, and found a tusk 8 feet long and 12 inches in circumference in the 

 middle, besides other bones \a ithin 20 feet of those first recorded. 



