10 



THE GEOLOGIST. 



Serpula vertebralis. 

 Astarte sinuata (Bean). 



a larger species. 



Nucula ovata. 

 suhrecurvum. 



Cucullea. 

 Gryphcea sinuata. 

 Pecten (imdescribed). 

 Ammonites quadrifidus. 

 cavaticus. 



9. An impure micaceous sandy clay, containing many nodules, 

 and numerous fragments of Ammonites and Belemnites ; apparently 

 the detritus of a previous deposit. It also contains many ribs and 

 vertebrae of Saurian animals 5 feet. 



In this bed we find — 



Pholadomya decussata. 

 Mya (T) depressa. 

 Cytherea iilana. 

 Inoceramus concentricus. 



Terebratula suhundata. 

 Avicula multicostata. 

 Rostellaria Farkinsoni. 

 Pleurotomaria (undescribed). 



10. A clay similar to 7, but of a higher colour, containing — 

 Serpula vertebralis. I Turho pulclierrimus. 

 Belemnites jaculum. Cerithium, n. s. 



B. subrecurvum. | Nucula ovata. 



At its base is a thin pyritic layer, rich in beautiful Ammonites. 

 Ammonites currindus. A. regalis (Bean, MS.). A. furcellatus. 



Thickness 4 feet. 



11. A band similar to 9, with similar fossils. Thickness . 2 feet. 



12. A strong band of blue clay, with a few imperfect fragments of 

 Ammonites 3 feet. 



13. A bed of whitish claystone, containing a species of Astacus (not 

 in nodules) and two very well marked distinct species of Ammonites, — 

 A. munitus (Bean, MS.), and a species in which the costse of the outer 

 whorl are so deeply divided as to cut half through the whorl. 1 foot. 



14. Another band containing compressed flattened casts of bivalves, 

 all imperfect, and Ammonites marginatus 4 feet. 



15. The great band of Hamites, comprising H. maximus and kindred 

 forms, sometimes free, when they are generally crushed except the last 

 chamber, representing about half a whorl ; often in nodules, and then 

 better preserved li feet. 



16. Another bed of Hamite-like Cephalopods ; not the same as the 

 last ; comprising Grioceras Beanii and kindred forms, often of immense 

 size 3 feet. 



