ZONE OF ARIETITES RARICOSTATUS. 



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Fossils of the Zone <?/" Arietites raricostatus/roM near Cheltenham. 



Cephalopoda. 



Aegoceras armatum densinodum, Querist. 



— lacunatum, Buck. 



— mniicwra, (T Orb . 



— subplanicosta, Oppel. 



Chemnitzia parva, Wright. 

 Pleurotomaria similis. Sow. 



Limea acuticosta, Munst.. 

 Cardinia hybrida, Sow. 

 Gryphsea obliquata, Sow. 

 Hippopodium ponderosum, Sow. 



Lingula Metensis, Terq. 

 Khynchonella variabilis, Schloth. 



Berenicea striata, Haime. 



Acrosalenia minuta. Buck. 



Montlivaltia mammiformis, Dune. 

 — mucronata, Dune. 



Arietites Nodotianus, d^Orb. 



— raricostatus, Ziet. 

 Belemnites acutus, Mill. 

 Nautilus striatus, Sow. 



Gasteropoda. 



Pleurotomaria raricostae, Tate. 

 Cryptaenia expansa, Sow. 



Lamellibranchiata. 



Ostrea raricostae, Wright. 

 Pecten aequalis, Quenst. 

 Pleuromya oblonga, Wright. 

 Unicardium cardioide, Phill. 



Braciiiopoda. 



Spiriferina Walcotii, Sow. 

 Waldheimia numisnialis, Schloth. 



PoLYZOA. 



I Stromatopora antiqua, Haime. 



ECHINODERMATA. 



I Pentacrinus scalaris, Goldf. 



Anthozoa. 



Montlivaltia radiata, Dune. 

 — rugosa, Wright. 



Foreign correlations. — The Oxi/notus-hQdi^ in Wiirttemberg so closely resemble those 

 near Cheltenham, both in their Petrology and Palaeontology, that when examining the 

 fossils from these rocks in the Stuttgart aiid Tubingen Museums I failed to see any 

 difference between the German and the English specimens ; so much alike were they 

 that, without marking the fossils before comparing them, I should have mistaken the one 

 for the other. This was especially the case with Aegoceras biferum, Aeg. lacunatum., and 

 Amaltheus oxgnotus. This zone is feebly developed in some of the Departments of France. 

 M. Marcou has found its fossils in the Jura Department. Few of the Ammonites 

 appear to have passed into M. d'Orbigny's hands, as neither of the three leading species 

 enumerated above is figured in the ' Paleontologie Fran9aise/ unless it may turn out 



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