20 



THE LIAS AMMONITES. 



26 



LiTHOLOGY AND LoCAI. NaMES OP BeDS. 



Light-coloured clay 



Argillaceous limestone. " Top Liveries " 



(lower) 



Clay 



Greyish limestone. " Extra rock," 



" Thick paving-bed " 



Clay 



Greyish limestone. " Quarters." Thin 



and irregular when covered by the 



preceding 2 in. to 



Clay 



Greyish limestone. "Ribs." A con 



stant bed 



Clay 



Limestone. " Paving-stone " 



Clay 



/resect Limestone. "Bottom rock" .. 



Clay 



Limestone. "Hoggs" 3 in. to 



Strong hard clay 



Argillaceous limestone ; imperfect stone. 



" Ruskiu " 



Laminated clay 



Fragmentary shelly limestone. " Grizzle 



bed" 



Stony shale. 



Hard limestone. " Blue stone " or 



" Blocks " 



Hard clay 



Limestone. " Grave-stone rock " 



Clay. Thin hard plates of stone lie in 

 tliis clay 



Limestone, underlain by clay. (The 

 clay frequently wanting) 



Limestone ; inconstant. " Gummerals" 



Clay. 



Hard grey limestone. " Fire-stone beds" 



Clay 



Limestone 



Clay 



Limestone 



Clay 



Hard dark limestone. " The Guinea- 

 bed." (This is the bottom bed of the 



quarry) 



1 in. to 



AVICTJLA CONTOETA BeDS. 



Thick clay-beds ; yellowish blue ; break- 

 ing in angular fragments 



Dark ferruginous clay, with conchoidal 

 fracture, the Estheria-bed 



Thick- 

 ness. 



ft. in. 

 7 



3^ 



1 1 



6 

 3i 



3 



8i 



3| 

 oi 

 3 

 lOi 

 3i 



8 

 6 



31 



3 



1 6 



1| 



6 



1 3 

 3t 



11 



Oi 

 6 



C 

 2 

 3 

 2 

 3 

 3 



10 



Organic Remains. 



Aegoceras Johnstoni, Sow. Insects' wings. 

 No fossils. 



Insects. 



A few Insects, and PJiolidophorus Stricklandi, Ag. 



More Insects here than in all the other bedi 

 collectively. 



Tetragonolepis angulifer, Ag. (Warwick Mus.) 

 No fossils in this bed. 



Saurian bones. Fishes' teeth and scales, Aegoceras 

 planorbis, Lima punctata, Protocardia Phillip- 

 piana, and Ostrea liassica ; spines of Cidaris 

 and other Echinidce abundant. 



Pleuromya Crowcomheia, and elytra of Coleoptera. 



Ichthyosaurus and Otopteris acuminata, Lin. & 

 Hut. 



Ostrea liassica. 



'\ Saurian remains and Protocardia Phillippiana. 



Modiola minima, PI. Crowcomheia, and O. liassica. 

 I In these limestones and clays only one small 

 [ Aegoceras planorbis has been found. 



Saurian bones, Avicula longicostata, Stutch., 

 Monotis fallax, Lima punctata, Pleuromya 

 Crowcomheia, Ostrea liassica, Hemipedina 

 Tomesii, Wr., in numbers ; Septastraa. 



[Belonging to the zone of Avicula contort a.l 

 Estheria minuta, var. Brodieana. 



