ZONE OF ARIETITES RARICOSTATUS. 



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Fossils of the Zone o/" Arietites raricostatus/;-o«« near Cheltenham. 



Cephalopoda. 



Aegoceras armatum densinodum, Querist. 

 • — lacunatum, Buck. 



— m\xiic\xxa,d' Orb. 



— subplanieosta, Oppel. 



Arietites Nodotianus, cl'Orb. 



— raricostatus, Ziet. 

 Belemnites acutus, Mill. 

 Nautilus striatus, Sow. 



Chemnitzia parva, Wright. 

 Pleurotomaria similis, Sow. 



Limea acuticosta, Milnst.. 

 Cardinia hybrida, Sow. 

 Gryphsea obliquata, Sow. 

 Hippopodium ponderosum, Sow. 



Lingula Metensis, Terq. 

 Bhynchonella variabilis, Schloth. 



Berenicea striata, Haime. 



Acrosalenia minuta, Buck. 



Montlivaltia mammiformis, Bunc. 

 — mucronata, Dune. 



Gasteropoda. 



i Pleurotomaria raricostse, Tate. 



Cryptsenia expansa, Sow. 



Lamellibranchiata. 



Ostrea raricostse, Wright. 

 Pecten sequalis, Querist. 

 Pleuromya oblonga, Wright. 

 Unicardium cardioide, Phill. 



Brachiopoda. 



PoLYZOA. 



Spiriferina Walcotii, Sow. 

 Waldheimia numismalis, Schloth. 



Stromatopora antiqua, Haime. 



ECHINODERMATA. 



I Pentacrinus scalaris, Goldf. 



Anthozoa. 



Montlivaltia radiata, Bunc. 

 — rugosa, Wright. 



Foreign correlations. — The Oxynotus-h&A?, 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 and Tiibingen 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 oxynotus. 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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