246 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[Apr. 3, 



that county (appearing to represent the Upper Perruginous Sand of 

 Lincolnshire) lying directly on the Lower Sand and Sandstone, 



The limestones of the Tealby series are very variable in composi- 

 tion, some being exceedingly arenaceous, and may indeed be described 

 as sands cemented by calcareous matter, whUe others are extremely 

 hard, crystalline, and blue-hearted. Large veins of calcspar, and 

 nodules of pyrites are in some places very abundant ; at Bully Hill 

 the fissures of the limestone contain considerable quantities of black 

 oxide of manganese. The softer limestones are largely used for 

 building-purposes, the harder as road-metal. 



The rocks of the Tealby series give rise to very marked features in 

 the physical geography of this district ; for, being cut through by 

 the numerous streams flowing westward from the watershed, they 

 form a number of prominent spurs standing at right angles to the 

 chalk Wolds, the terraced appearance of which is in striking contrast 

 with the smoothly rounded undulations of the latter. 



e. Fossils of the Tealby Series. — The following list includes the 

 most characteristic species ; but, as there are a considerable number 

 of forms awaiting description, it is by no means exhaustive. 



List of Fossils from the Tealby Series, 



Wood (rather abundant). 

 Spongia paradoxica, Woodw., and 



allied forms. 

 Scyphia clavellata, Edm. 

 Spines of Cidaris. 

 Serpula filiformis, Sow. 

 antiquata, Sow. 



' ^P- 



Vermicularia Sowerbii, Mant. (rare). 



Terebratula faba, B'Orb., not Sow. 



hippopus, Rom. 



depressa, Lam. (many varieties) 



biplicata, var. obtusa, Sow. 



sella, Sow. 



Bhynchonella parvirostris, Sow., sp. 



Gribbsiana, Sow., sp. 



Ostrea frons, Park. 



, sp. 



Exogyra sinuata, Sow. 



Anomia, sp, 



Perna E-icordeana ?, IX Orb. 



Pecten cinctus, Sow. 



orbicularis, Sow. 



elongatus. Lam. 



(several other species). 



f. The Lower Sand and Sandstone. — This division consists of a 

 very variable mass of sands, in some places indurated into loose 

 sandstones. In numerous localities along the lower slopes of the 

 limestone hills every variety of these sands may be seen, from the 

 finest white sand, fit for glass-house purposes, to coarse dark-brown 

 conglomerates. In a large sand-pit some distance below the stone- 

 pit (already described) at North WiUingham, we have a section 20 



Lima (large species). 



Astarte substriata, Leym. 



Lucina crassa. Sow. 



Pleuromya, sp. 



Panopsea plicata. Sow., sp. 



Thetis Sowerbii, Bom. 



Trigonia alseformis, ParJc. 



Numerous casts of large Trigonim and 



other bivalves. 

 Pleurotomaria, sp. 

 Solarium ornatum, Sow.'i 

 Ammonites clypeiformis, JJ Orb. 



plicomphalus. Sow. 



(Several other species of Ammx)nites, 



probably new). 

 Ancyloceras Duvalii, Leveille, sp. 



Puzosianus, Z>' Orb., sp. 



Crioceras ? Bowerbankii, Sow. 

 Belemnites lateralis, Phil. 



jaculum, Phil. 



semicanaliculatus, JBlain. 



minimus ?, Mill. 



Yertebrae and teeth oi Ichthyosaurus. 

 Vertebrae of Plesiosaurus. 



