44? New Species of Trilohite. 



surface of the head. There is also a small tuberosity situated 

 in the centre of the head between the orbits. 



Lime formations in this country, if we may judge from the 

 fossils they contain, appear to be of great variety and strangely 

 dispersed throughout the western side of the island. The 

 Dudley lime is considered by geologists to be transition lime- 

 stone, and from its immediate vicinity to the trap rocks of 

 Rowley, it is reasonable to suppose that it has been raised 

 from a great depth below the surface, by some volcanic action. 

 The Castle Hill at Dudley, consisting of limestone, is not a 

 quarter of a mile from Cawney Hill, which is composed of 

 basaltic columns. The lime strata of Dudley dip principally 

 to the east and to the west, and are raised in the shape of a 

 cone, with their lines of continuity at the summit broken 

 away. {fg. H.) The dip to the east appears to pass under 



Dudley. Tipton. Wednesbury. Walsall. Barr. 



Jiay Head 

 Lime works. Coal and Ironworks. Lime works, time works. 



the Wednesbury coal field, and to crop out again at Walsall, 

 a distance of nine miles, where it is recognised by the fossils 

 bearing an exact resemblance. It is singular that at this place 

 it should be again accompanied by the trap rock, which appears 

 at Pouch Hill *, situated at a distance of little more than a 

 mile. Hay Head, in the parish of Barr, is situated about two 

 miles east from Walsall, and is the spot where this singular 

 Trilobite was discovered. The limestone here appears of a 

 darker colour, more condensed, and is slacked with less 

 facility than that of Dudley or Walsall, and appears from its 

 outcrop to be an under-stratum. The Orthoceratite, I be- 

 lieve, has never been discovered at Dudley, but in these 

 quarries most beautiful specimens of that fossil are frequently 

 found, and of considerable magnitude. 



I remain, your obedient servant, 



Frederick Jukes. 

 General Hospital, Birmingham, Nov, 12. 1828. 



The Dudley fossils have so long been objects of admiration 

 among naturalists, that it is a remarkable fact that so large and 



* At this place fine specimens of Radiated Zeolite and Prehnite are 

 found. 



