PKESTWICH CKAG-BEDS OF SUFFOLK AND NORFOLK. 



125 



sand and Haggy limestone is worked in a pit a few yards to the south- 

 east of the barn at the extreme south-west point of Gedgrave Hill. 

 The shelly beds, with flags of sheUy limestone at Tattingstone (see 

 section in Part II.), may possibly be referred also to zone d. 



With regard to the bed of phosphatic nodules, it is no longer 

 exposed at Sutton, and it has not been reached in any of the pits in 

 the neighbourhood of Orford ; but there is a shallow pit now worked 

 between Butley Abbey and Butley Hiver, which may probably be- 

 long to the base of the Coralline Crag ; the crag-beds themselves 

 have been removed, with the exception of a foot or two, which is so 

 disturbed as to render its identification doubtful. Still, from the 

 abundance of Cardita senilis, Astarte Omalii, and Oyprina islandica, 

 the occurrence, although rare, of Mytilus hesperianus, Pecten maxi- 

 mus, and Isocardia cor, and the absence of the ordinary shells of 

 the Red Crag, with the exception of a few specimens of Trophon 

 antiquus, near the surface, I should feel disposed to consider this 

 a disturbed portion of the Coralline Crag, and to refer the 2-foot 

 coprolite-bed below it to this formation. 



Organic Remains. 

 The Mollusca of the Coralline Crag have been worked out by Mr. 

 Searles Wood with so much skill and perseverance that there is little 



Pectunculus glycymeris. 

 Limopsis aurita (rare). 



• pygmsea. 



Nucinella miliaris. 

 Area pectunculoides. 

 Nucula leevigata, var. 



tenuis ? 



nucleus. 



Leda pygmsea. 

 Kellia ambigua. 



— , large var. 



Montacuta bidentata. 



• truncata. 



substriata. 



ferruginosa. 



Cryptodon sinuosuiii. 

 Lucina borealis. 

 Diplodonta rotundata. 



dilatata. 



Cardium nodosum. 



strigilliferum. 



decorticatum. 



Cardita senilis. 



sealaris. 



orbicularis. 



corbis. 



-- — • , var. 



Erycinella oval is. 

 Astarte triangularis. 



parvula. 



Basterotii. 



mutabilis. 



Omalii. 



gracilis. 



Astarte Burtinii. 

 ? digitaria. 



Cyprina islandica. 



rustica. 



Circe minima. 

 Cytherea rudis. 

 Venus imbricata. 

 — — casina. 



ovata. 



Gastrana laminosa. 

 Donax politus. 

 Tellina obliqua. 



donaoina. 



Syndosmya prismatioa. 

 Mactra obtruncata. 



triangulata. 



Lutraria elliptica. 

 Solen ensis. 

 Tliracia phaseolina. 



inflata. 



Pholadomya hesterna (?). 

 Corbula nucleus. 

 Saxicava? carinata. 

 Glycimeris angusta. 

 Terebratula grandis. 



Ditrupa subulata. 



Balanus concavus (retaining colour). 



■ bisulcatus (common on Lucina 



and Pecten Grerardii). 

 Cellepora edax. 

 Hornera infundibulata. 

 Cupularia porosa. 



