232 CATALOGUE OF THE LOCAL FOSSILS IN THE 



2. Ked Makl = The Lower-red Marl of Yorkshire. 



This deposit, in some of the Tees-side Salt-horings, contains a 

 thick deposit of Rock-Salt of Permian age. 



3. Upper, thin-bedded limestone. 



Beds of yellow, earthy, friable limestone in thin beds, with 

 occasionally beds of a compact, hard, and crystalline structure, 

 and more rarely beds of oolitic structure. 



Localities. — On the coast at Eoker, South Dock at Sunderland, 

 where it formerly formed a low cliff under the Town moor, now 

 obscured by buildings, and in the cliffs at Hartlepool. 



Fossils. — The characteristic fossils are — 

 Chondrites virgatus, Miinstr., Dyas, PI. 24, f. 5. 

 Axinus dubius, Schloth., Perm.Poss., PI. 15, f. 23-32. 

 Pleurophorus costatus, Brown,Perm.Foss.,P1.15,f.l3-20. 



4. BoTEYOIDAL, CONGLOBATED OB BALL-LIMESTONE. 



The beds of this series consist chiefly of coralloid, sphseroidal, 

 botryoidal forms of limestone, with other associated beds of a 

 mammillated or stalactitial structure, and with highly crystalline, 

 close-bedded, compact layers interstratified with others which 

 are nearly friable and pulverulent. 



Locality. — The best sections of these beds are seen on the 

 coast from the middle of Marsden bay to Roker, near the mouth 

 of the "Wear — Cleadon Hills, Pulwell Hill, and Building Hill 

 near Sunderland. Several patches occur between Hendon and 

 Ryhope, and at Black Halls, on the coast south of Castle Eden 

 Dene. 



Fossils. — The characteristic fossils of this series are given fully 

 in the list below, but it may be remarked that no Brachiopod 

 occurs in the original beds of the upper series above enumerated, 

 and the fishes that have been found are peculiar to it, and 

 limited to the lower members of the series. These little Palseo- 

 niscoid fishes (Acentrophori, Traquair) have in all probability 

 been carried by floods along with the plant-remains that occur 

 with them out into the Permian sea, and were there entombed 

 between the layers of marl that were then being thrown down. 



