PEESXWICH CEAG-BEDS OF STJPFOLE: AND NORFOLK. 



455 



advantage. The collections of these gentlemen now contain above 

 seventy species from this bed ; and I am indebted to them for the 

 following list * : — 



List of Shells found at Aldeby bi/ Mr. W. M. Crowfoot and 

 Mr. E. T. bowson. 



c. common, r. rare. fr. fragments, vc. very common, vr. very rare, 



n c. not common. Por one or two specimens numerals are given. 



Bivalves. 



Abraalba? vr 



■ prismatica r 



Anomia aculeata r 



ephippium r 



striata r 



Astarte borealis r 



compressa, 2 vars v c 



sulcata V c 



Cardium eclule c 



grcenlandicum vr 



nodosum r 



strigHliferum ? vr 



Cochlodesma complanatum ... r 



Corbula striata v c 



Cryptodon sinuosum vr 



Cuitellus pellucidus r 



Cyprina islandica vc 



Donax vittatus c 



Kellia ambigua 1 



Leda limatula c 



pygmtea {Bell) 1 



Lepton nitidum r 



Loripes divaricatus vr 



Lucina borealis vc 



Lucinopsis undata vr 



Mactra ovalis vc 



solida r 



subtruncata vr 



Modiola modiolus vr 



Montacuta bidentata r 



ferruginosa r 



substriata vr 



Mya arenaria vc 



truncata r 



Mytilus edulis c 



Nucula CobboldiiB c Balanus crenatus , 



tenuis nc porcatus 



Pecten tigrinus nc 



opercularis nc 



Pectunculus glycymeris?, worn 1 



Saxicava rngosa and var c 



Solen siliqua ?, fragment v r 



Tellina fabula 1 



lata vc 



obliqua vc 



pr^etenuis c 



Thracia phaseolina nc 



Venus ovata vc 



Univalves. 



Action tornatilis r 



Bulla regulbiensis vr 



truncata vr 



Calyptrsea chinensis r 



Capulus ungaricus, var 1 



Cerithi um tricinctum 1 



Chemnitzia — ?, fragment ] 



Clavatula linearis vr 



turricula c 



Hydrobia ulvse ? vr 



Littorina littorea r 



Natica clausa vc 



helicoides r 



Purpura lapillus r 



Eingicula buccinea v r 



ventricosa v r 



Scalaria groenlandica r 



Trevelyana r 



Trochus tumidus c 



Trophon antiquum . , r 



Turritella communis v r 



As the pit is a small one, and the sands are only occasionally 

 excavated, it is easy to see how rich and promising the locality is. 

 In the shell-bed a few Mammalian remains have been found, in- 

 cltiding tooth and part of antler of Deer, teeth and bones of small 

 Eodent, vertebrae of Whale, together with bones and vertebrae of 

 Fish, otolites, spines of Echini, Foraminifera and Bryozoa. 



There are no Crag-pits between Aldeby and the neighbourhood 

 of Norwich, where we have the well-known sections of Thorpe, 



* In this list, as well as in that of Mr. Reeve, the greater part of the species 

 have been, I understand, determined by Mr. Searles Wood. 



