188 ME. J. W. KIKKBY OS THE FOSSILS OF THE 



Marl-slate in the wells and drifts which have been excavated 

 there. Through the courtesy of the directors, I had an oppor- 

 tunity of carefully splitting and examining a portion of a large 

 quantity that had been brought to bank ; but I met with com- 

 paratively few fossils. The species found are Palceoniscus comptus, 

 Ag., Pal. elegans, Sedg., Pal. macropthalmus, Ag., Pygopterus 

 mandibular is"? Ag., Ullmanina selaginoides, Brong., and Lingula 

 mytiloides (Credneri), Sow., besides numerous fragments of copro- 

 litic matter, and a few of vegetables showing an obscure micro- 

 scopic structure. I only met with a single example of the 

 Lingula. 



At Hartley's Quarry, Sunderland, I have before noticed the 

 occurrence of most of the preceding species in the Marl-slate. 



At Claxheugh, in the Marl-slate exposed in the face of the 

 river section, a specimen of Palceoniscus comptus, Ag., has been 

 found by some of the members of the South Shields Geological 

 Club. The same locality has also yielded me a good example of 

 JJllmannia selaginoides, Brong. 



From the Marl-slate brought to bank in sinking the two pits 

 at the Byhope Colliery, near Sunderland, Pal. comptus, Ag., 

 Acrolepis Sedgwichii? Ag. (fragment), as well as the Ullmannia, 

 have been obtained. This material, however, has not been well 

 searched. 



LOWER MAGNESIAN LIMESTONE. 



Whitley Quarry. — This locality has almost ceased to be a fos- 

 siliferous one, owing to the lower beds that gave it this character 

 being now covered many yards deep with water. The following 

 list of species is thus chiefly derived from the work of Professor 

 King. 



Nautilus Freieslebeni, Gei. 



Gervillia antiqua, Miin. 



Leda speluncaria, Gei. 



Astarte Yallisneriana, King. 



Myacites elegans, King. 



Producta horrida, Sow. 



