THE CORALLIAN ROCKS OP ENGLAND. 



267 



Cylindrites elongata (Ph.). 

 Pleurotomaria Miinsteri (Bom.). 



reticulata (Soto.). 



Dentalium cinctum (Gold/.). 

 Pholadomya deceincostata (Rom.). 



paucicosta (Bom.), var. 



Myacites jurassi (Brongn.). 

 Arcomya, sp. 



Ceromya excentrica (Ag.). 

 Astarte ovata (Sow.). 



extensa (Ph.). 



polyruorpha (Cont.). 



Cypricardia glabra (Bl. <$f H.). 

 Opis Phillipsi (Mor.). 



corallina (Damon). 



Unicardium sulcatum (Leek.). 

 Lucina aliena (Ph.). 

 Isodonta Deshayesea (Buv.). 

 Sowerbya triangularis (Ph.). 

 Cardium cyreniforme (Buv.). 

 Protocardium isocardioides (Bl. Sf 



H.). 

 Trigonia clavellata (Sow.). 



Meriani (Ag.). 



monilifera (Ag.). 



Nucula nuda (Ph.). 

 Cucullasa corallina (Damon). 

 Mytilus pectinatus (Sow.). 



Modiola subaequiplicata (Gldf.). 

 Pinna granulata (Sow.). 

 Avicula Struckmanni (De Lor.). 



pteropernoides (Bl. <$f H.). 



Perna quadrata (Ph.). 

 Gervillia aviculoides (Sow.). 

 Lima elliptica ( Whiteaves). 



rigida (Sow.). 



Plicatula fistulosa (M. $ L.). 



semiarmata (Et.). 



Pecten fibrosus (Sow.), var. 



qualicosta (Et.). 



■ virdunensis (Buv.)*. 



intertextus (Bom.). 



Hinnites velatus (Gold/.). 

 Ostrea solitaria (Sow.). 



deltoidea (Sow.). 



duriuscula (Ph.). 



Exogyra nana (Sow.). 

 Astrogonium, sp. 

 Cidaris florigemma (Ph.) [rare]. 

 Hemicidaris intermedia (Flem.) 

 Pseudodiadema versipora (Ph.). 

 Echinobrissus scutatus (Lam.). 

 Thamnastraea arachnoides (E. Sf H.). 



concinna (Ph.) 



Thecosmilia annularis (Flem.). 



The appearance of these various divisions, when we encounter them 

 in an inland section, is so different from that on the coast, and such 

 sections are so rare, that we are induced to give an account of such 

 a one as is met with in the Eodwell cutting of the Weymouth and 

 Portland Eailway. We here find the following series : — 



Section of Gorallian heels in Rodivell cutting. 



1. 

 ( 2. 



" Trigonia- J 4. 

 beds". * 



5. 

 6. 



I 7. 

 8. 

 9. 



" Osmington 

 Oolite" 

 series. 



10. 

 11. 



Grits." 



12. 



14. 

 15. 



Blue clay 



Hard blue impure limestone in 6 courses, with 

 numerous casts of Trigonice, Pleurotomaria, &c... 



Rubbly limestones with marly partings (8 in.) very 

 slightly oolitic 



Oolite marl, full of fossils, particularly Myacites. 

 This might almost be termed a fine-grained pisolite 



Grey rubbly limestone, scarcely oolitic 



Stiff marl, very oolitic towards the base, with a 

 hardened ferruginous bed in the centre 



Hard f erruginous oolite 



Marl with flaggy calcareous grit 



Strong semi-oolitic flagstone with calcareous mark- 

 ings 



Blue clay with oolite grains at the base 



Solid, shelly and oolitic light-coloured limestone, 

 with Echinobrissus scutatus 



Light-coloured marl, becoming oolitic below 



Rough sbaly oolite in 2 blocks 



Marls 



Fine-grained calcareous grit 



ft. in. 



12 



7 



4 







1 



6 



4 



9 



4 







3 







1 







3 



8 



3 



8 



2 







4 







6 







2 







* Allied to P. lens. 



