186 



REPoM— 1903. 



recurrences of clear deep-soa conditions during Avhicli the Yoredale Lime-= 

 stones were deposited. In this district the Crystalline Limestones are 



Fiu. 1. 



very thin, whilst the thicker ones are shallow -sea deposits, as proved by 

 their detrital character. 



No. 2 Shaft (tig. 1) at Bullhill Sike passed through the following 

 beds : — 



ft. in. 



Fossiliferous bullions. 

 Jidmoixlia sulcata, ProtoscMzodus 



axiitiformis. 



From the black shales the folloAving fossils were collected :— 



Arclueocidaris sp. 

 Clwiu'tis Lfifjuessiana. 

 Di.'iciiia iiitida. 

 Linrjula mi/tiloides. 

 Orthis Mic/iclhii. 

 Orthotetes crcni stria. 

 Pi'i 'ductus lonyisjj'mus. 



Sp'trifcra liiieatus. 

 Ctenodonta sp. 

 Si/nci/cloiiema sp. 

 Belleroplwn sp. 

 Jiapliistoma sp. 

 TrilohUe. 



The mouth of the tunnel at No. 3 Shaft is driven in dark shale 

 containing a 1-inch band of Limestone, from which were obtained the 

 following : — 



Camaroplwria crvmvna. 

 Orthotefps crenistria. 

 I'Toductua scabriculiis. 

 Mhynchonclla 2>lourodun. 



Spirifera triffonalis ? 

 Phillipsia sp. 

 Reed-like plant-remains. 



In the shale itself Aviculopecten dissimilis was obtained. 



