FROM THE ZONE OF AMMONITES RARICOSTATUS. 57 



XVI. Corals from the Zone of Ammonites raricostatus, Ziet. 



The brick-fields in the vicinity of Cheltenham present dark-coloured clay beds, which 

 have the foUovifing succession (see Wright, 'Fossil Oolitic Asteriadse,' p. 25). 



Marie Hill Section. 



NO. FT. IN. 



1. Gri/phcea-bed ; a hard, ferruginous clay, which broke into frag- 



ments, and contained GryphcBa obliquata, Sow. . . 3 to 4 



2. Coral-band ; a thin seam of lightish-coloured unctuous clay, 



containing a great many small sessile Corals, Montlivaltia 

 rugosa, Wright and Duncan, most of which appeared to 

 have been attached to the curved valves of the Gryphasae . 1 in. to \\ 



3. liippopodium-bed . . . . . 10 , 



4. Jmmonite-bed ..... ? 



In Warwickshire the railway-cutting at Honeybourne presented the same beds, and 

 the Coral-band contained a considerable number of the Montlivaltia. 



A section on the line of railway at Fenny Compton, in Oxfordshire, near the 

 station, presents the following beds in descending order ; the bed No. 2 is highly 

 coralliferous.^ 



Fenny Compton Section. 



NO. FT. IN. 



1. White clay, containing Gryphma obliquata {Maccullochii ?), 



G. incurva, Belemnites acutus, Hippopodium ponderosum, Pleu- 



rotomaria similis, &c. . . . .40 



2. Blue clay, with included hard blue calcareous bands, containing 



Corals and the Mollusca mentioned in Bed No. 1 .20 



8. Blue shale . . . 10 



Middle Lias clays and shales, with Ammonites Ilenleyi, are superimposed on 

 Bed No. 1 ; and the blue shale (3) rests on a clay with calcareous masses, the " Cardinia- 

 zone." 



The Coral-bands at Marie Hill and Honeybourne are upon the same geological 

 horizon as bed No. 2 of the Fenny Compton section. These beds contain some of the 

 finest specimens of Montlivaltia ever discovered. 



1 The Rev. P. B. Brodie, M.A., F.G.S., has given me great assistance, and has furnished me with this 

 section. 



