244 CATALOGUE OP THE LOCAL FOSSILS IN THE 



or backs. Replacement to a very great degree has taken place 

 in these beds, so that layers of fine marly partings are inter- 

 calated with the limestone. Fossils have been found chiefly in 

 the lower layers of the limestone, but they also occur higher up 

 in this stratum. The first examples of fish remains were dis- 

 covered in the lower layers of this limestone at Pallion, on the 

 "Wear ; and were described by the late Dr. Clanny, of Sunderland, 

 as a Chaetodon. This fine specimen of Platysomus striatus is 

 still preserved in the Free Museum at Sunderland. 



Locality. — In the outlier at Whitley; and on the coast it forms 

 a little basin in Cullercoats Bay, north of the Ninety -fathom dyke. 

 In the Cliff at Tynemouth, where it has been broken up and 

 formed into a conglomerate, previous to the deposition .of the 

 upper concretionary bed upon it. It forms the base of the cliff 

 from North Point or Trou Eocks to Man Haven, north of Mars- 

 den Bay. It forms the base of the Escarpment at Westoe, 

 Harton, Down Hill near "West Boldon, at Claxheugh, Pallion, 

 and Millfield. It is seen in Humbleton Quarry, Tunstall Hope, 

 Painshaw Hill, Houghton-le-Spring, Pittington — and most other 

 parts of the Escarpment to Pierce Bridge, on the Tees. 



The following' list includes nearly all the species that are 

 stated by Mr. Kirkby and others to have been observed in 

 the Lower Compact Limestone, many of which are in the 

 Collection, in Side Cabinet No. 26 and in the Gallery: — 



PLANTS. PLANTS. 



Name and Locality. Reference. 



Chondrites virgatus, Minster, Dyas,Pt. 2,P1.24,f.5. 



Loc. — Thickley Quarry, Claxheugh, etc. 



Palseophycus insignis, Geinitz, Dyas,Pt.2, P1.24,f.4. 

 Loc. — Thickley Quarry. 



ANIMALIA. 



Dentalina Permiana, Jones, Mon. Perm. Eoss., 



Loc. — Thickley Quarry, Westoe. PI. 6, f. 1. 



Trochammina pusilla, {Geinitz) Perm. Foss., PI. 6, 

 Loc— Thickley Quarry, Westoe. 17-9; P1.18,f.l3a-d. 



