70 



THE LIAS AMMONITES. 



Brachiopoda. 



Disciua Holdeni, Tate. 

 Rhynchonella variabilis, Sehloth. 



— furcillata, Theod. 



— rimosa, Theod. 

 Spiriferina verrucosa, von Buck. 



Plumaster ophiuroides, Wright. 



Serpula plicatilis, Goldf. 



Terebratula punctata, Sow. 

 Waldheimia indentata, Sow. 



— nuraismalis, Sehloth. 



— Waterhousei, David. 



— subovoides, Rom. 



ECHINODERMATA. 



I Pentacrinus basaltiformis. Miller. 



Annelida. 



Serpula tricristata, Gold/. 



Yorkshire. — The Jamesoni-beds are found at the north side of Robin Hood's Bay, 

 where the following important section was made by Messrs. Tate and Blake,^ the thick- 

 ness of the beds there amounting to 225 feet : the position of the fossils so carefully 

 noted in each is of great value in reading correctly the Palaeontology of this zone. 



Jamesotii-beds, Bobin Hood's Bay. 

 Base of the Henleyi-beds : the section to be read in a descending order. 



No. 



LlTHOLOGY. 



10 

 11 

 12 



13 

 14 

 15 

 16 

 17 



18 

 19 



20 

 21 

 22 

 23 



Hard, crumbly, light shale . . . . 



Dogger 



Shale 



Irregular dogger. 



Shale 



Brown sandv layer 



Shale ' 



Variable dogger 



Shale with indurated bands 



dales 



Scattered dogger-band 



Shale 



Dogger 



Hard, crumbly shale 



Dogger 



Bluer shale 



Dogger irregular. 



Bluer shale 



and 



Well-marked dogger 



Hard, grey, indurated shale, with more 



indurated band in the middle 



Dogger 



Blue shale 



Dogger 



Blue shale 



Thick- 

 ness. 



ft. in. 



5 



6 



10 



4 



3 



5 3 



2 6 



13 6 



1 



2 9 

 3 



13 



6 



2 



7 



3 



Organic Remains. 



Aeg. striatum, Lytoceras fimbriatum, Ophioderma 

 Gaveyi. 



Belemnites elegans. 



Aeg. hrevispina, Sow., Grypheea obliquata, Sow., 

 Modiola sealprum. Sow., Pleuromya ovata, 

 Sow. 



Belemnites elegans, Monotis incequivalvis, Sow. 



Pecten equivalvis, Sow., Limea acuticosta, Miinst., 

 Pinna folium, Y. & B. 



Grypheea obliquata, Aeg. brevispina. Sow. 



1 ' Yorkshire Lias,' pp. 79—81. 



