Mr. Tate on the Geology and Archceology of Beadnell. 99 



There are in this section fourteen different limestones, 

 varying in thickness from 2 feet to 30 feet, and having an 

 aggregate thickness of 171 feet. Most of them are of a bluish 

 colour and yield good lime, and many fossils characteristic 

 of the Mountain Limestone Formation occur, especially in 

 the thicker sills and in the calcareous shales connected with 

 them. The main limestone, number ^8, is the most fossili- 

 ferous, and the following list, though far from being complete, 

 will shew how rich it is in organic remains. 



FISH. 



A few remains of fish appear, viz., a 

 portion of 



Megalichthys Hibbberti (Ag.) consist- 

 ing of scales of a quadrate form, one 

 inch across — this was a sauroid fish 

 allied to the Lepidosteus or Bony 

 Pike. 



Cladodus mirabilis (Ag.) 



Cochliodus magnus (Ag.) 



These are teeth of Ganoid fish of 

 the order Pycnodonti, whose forms 

 were short and compressed, the fins 

 small, and the teeth adapted to crush 

 marine animals with hard coverings. 



CRUSTACEUS. 



Griffithides Farnensis (Tate). 



MOLLUSKS. 



Orthoceras sulcatum (Flem. ) 

 Orthoceras Goldfussianum (Kon.) 

 Naticopsis plicistriae (Phil.) 

 Loxonema rugifera (Phil.) 

 Euomphalus carbonarius (Sow) 

 Pieurotomaria decipiens (McCoy) 

 Pleurotomaria atomaria (Phil.) 

 Platyschisma heiicoldes (Sow) 

 Bellerophon Urii (Flem.) 

 Orthis resupinata (Mart.) 

 Orthis Michelini (Kon.) 

 Strophomena crenistria (Phil.) 

 Productus Martini (Sow.) 



Productus punctatus (Mart.) 

 Productus scrabiculus (Mart.) 

 Productus spinulosus (Sow.) 

 Productus fimbriatus (Sow. ) 

 Productus latissimus (Sow.j 

 Productus Flemingii (Sow.) 

 Productus semireticulatus (Mart.) 

 Chonetes sordida (Sow.) 

 Chonetes Dalmaniana (Kon.) 

 Chonetes gibberula (McCoy) 

 Spirifer trigonalis (Mart.) 

 Spirifer glaber (Mart.) 

 Spirifer lineatus (Mart.) 

 Spirifer octoplicatus (Sow.) 

 Edmondia sulcata (Phil.) 

 Sangui!)olites iridinoides (McCoy) 

 Sanguinolites transversa (Port.) 

 Sanguinolites variabilis (McCoy) 

 Aviculo-pecten docens (McCoy) 



BRYOZOA. 



Fenestella ptebeia (McCoy) 

 Fenestelia crassa (McCoy) 

 Fenestella uiidulata (Phil.) 

 Glauconome pluma (Phil.) 

 Sulcoretepora parallela (Phil.) 



CORALS. 



Aulophyllum fungites (Flem.) 

 Lithodendroii irregulare (Phil.) 

 Stenopora tumida (Phil.) 

 Favosites parasitica (Phil.) 

 Favosites serialis (Port.) 



The calcareous shale is remarkably full of fossils ; it is 

 indeed almost entirely formed of Productus Flemingii and 

 Spirifer trigonalis; and being exposed to the weathering 

 influence of the tide, which washes away the softer matrix, 

 the fossils stand out in bold relief, and fine specimens of the 

 Productus can be obtained, beautifully shewing the curious 

 internal structure of the shell. 



The limestone which forms the bold headland of Ebbs Nook 

 is, however, the most interesting of the group, from its peculiar 



