70 



THE LIAS AMMONITES. 



Disciaa Holdeni, Tate. 

 Ehynchonella variabilis, Schloth. 



— furcillata, Theod. 



— rimosa, Theod. 

 Spiriferina verrucosa, von Bnch. 



Plumaster ophiuroides, Wright. 



Serpula plicatilis, Goldf. 



Brachiopoda. 



Terebratula punctata. Sow. 

 Waldheimia indentata, Sow. 



— numismalis, Schloth. 



— Waterhousei, David. 



— subovoides, Mom. 



ECHINODERMATA. 



I Pentacrinus basaltiformis, Miller. 



Annelida. 



I Serpula tricristata, Goldf. 



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. 



Jamesoni-beds, Robin Hood's Bay. 

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



No. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 



18 

 19 



20 

 21 

 22 

 23 



LlTHOLOGY. 



Thick- 

 ness. 



Organic Remains. 



Hard, crumbly, light shale 



ft. 

 5 

 



10 



4 

 

 5 



2 



13 

 1 

 2 

 



13 

 

 2 



7 







11 

 

 2 

 

 5 



in. 

 

 6 

 





 3 

 3 

 6 



6 

 

 9 

 3 

 

 6 

 







3 



6 

 3 

 4 

 4 

 



Aeg. striatum, Lytoceras Jimbriatum, Ophioderma 

 Gaveyi. 



Belemnites elegans. 



Aeg. brevispina, Sow., Gryphcea obliquata, Sow., 

 Modiola scalprum. Sow., Pleuromya ovata, 

 Sow. 



Belemnites elegans, Monotis incequivalvis, Sow. 



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

 Pinna folium, Y. & B. 



Gryphcea obliquata, Aeg. brevispina, Sow. 



Dogger 



Shale 



Irregular dogger. 



Shale 



Brown sandv layer 



Shale 



Variable dogger 



Shale with indurated bands and no- 



Scattered dogger-band 



Shale 



Dogger 



Hard, crumbly shale 



Bluer sbale 



Dogger irregular. 



Bluer stale 



Well-marked dogger 



Hard, grey, indurated shale, with more 

 indurated band in the middle 



Blue shale 



Dogger 



Blue shale 



■* 'Yorkshire Lias,' pp. 79 — 81. 



