I860.] 



WBIGI1T LIAS. 



407 



Ammonites raricostatus, Ziet., above, are seen in the cliff near the 

 point where the road leads up to the Alum-works. At this locality 

 the Am. oocynotus bed is about 20 feet above the clays with Am. 

 obtusus. 



Ammonites oxynotus, Qaenstedt. 



Fossils of the Zone of Ammonites oxynotus. 



Ammonites oxynotus, Querist. 



bifer, Quenst. 



lacunatus, Buck. 



Nautilus striatus, Sow. 

 Belemnites acutus, Mill. 

 Pleurotomaria Anglica, Sow. 



Plicatula ventricosa, Mwnst. 



Modiola minima, Sow. 



Area. 



Leda. 



Acrosalenia lninuta, Buck. 



cidaris ; spines. 



6. The Zone of Ammonites raricostatus. 



Synonyms. — " Hippopodium-bcd (in part)," Murchison's (l,,],, u \ 

 of Cheltenham, 2nd ed., l»y Biieknian and Strickland, p. I I. •• E&ari- 

 costatenschichte," Fraas, Wiirttenib. naturw. .lahieshefte, 1847, 

 pi. 3. " Rarieostatenbank," (Juenstcdt, IS.")(>, Der .lura. p. 292. 

 " Die Scbichten des Ammonites raricostatus," Oppel, 1856, Die Jura- 

 formation, p. 56. 



The beds funniiiii this zone arc exposed in several briok-fields in 

 the vicinity of Cheltenham. They consist of dark-coloured olaya, more 

 or less impregnated with the peroxide <>t' iron. In an excavation 

 recently made near Marie Hill, for the purpose <>r obtaining claj to 

 make bricks for the town-sewers, the following section was obtained. 

 The beds are enumerated in a descending order. 



