Vol. 54.] 



AND TttE CO^AILIKE CEAG. 



335 



Fig. 8. — Section of the Gomer joit {from a sketch made by 

 Mr. P. F. Kendall in 1884). 



1 Made earth, passing into 



2 Red loamy sand. 



^ White pulverulent Crag with small 

 S 3 gasteropoda. 



j Argillaceous Crag with greatly de- 

 ^ V composed shells, passing into 

 '' Yellow argillaceous Crag, with no trace 

 of bedding, containing many spe- 

 cimens of Cyprina islandica, C. 

 rustica, and Panojocea JE^avjasii. 



5 Crag containing Cardita senilis, Venus 

 casina, As f arte Omalii, A. Bus- 

 terotii, TropJion consocialis, Tr. 

 alveolatus, Natica millepunctata, 

 Trochus zizypliinus, Tr. conulus, 

 etc. Many of the bivalves have 

 both valves united and the si- 

 phonal ends upward. 



6 False-bedded Crag made up of commi- 

 nuted shells. Characterized by 

 abundance of Turritella trijpli- 

 cata (incrassata) and Cardium 

 decorticatum. Contains bands or 

 patches of Pectens, the 3 species 

 P. maximus, P. ojpercularis, and 

 P. tigrinus being commonl}' asso- 

 ciated. 



Water 



^— — - - ^ Comminuted Crag, with many rare 



gasteropoda, notably Cajpulus 

 {BroccMa) jpartim-sinuosus. 



The following lamellibranchiata were found with both valves united, principally 

 in Bed 5 : — 



Anomia. 

 JBecten maximus. 



„ ojpercularis. 

 Modiola. 



Pecfunculus glycimeris. 

 Limojpsis aurita. 

 Nucula nucleus. 

 Leda. 

 Lucina borealis. 



Diplodonta rotundata. 

 Cardita corhis. 



,, scalaris. 



„ senilis. 

 Cardium decorticatum. 

 Astarte Basterotii. 



„ Galeottii. 



„ mufabilis. 

 Omalii. 



Cyprina islandica. 

 Venus casina. 

 „ ovata. 

 Gastrana laminosa. 

 Mactra. 

 Thracia. 

 Solen ensis. 

 Fanopcea Favjasii. 

 Mya truncata. 



The Gomer beds, regarded by Prestwich as belonging to his zone 

 P, are at a lower level, taking the dip into account, than those at 

 the Broom Hill pit, which he calls D & E. Stratigraphically, 

 therefore, the former, which are within 15 feet of the base of the 

 Crag, in which univalves are abundant, should be placed in zone C ; 

 but, according to Prestwich, one of the characteristic features of zone 

 C is said to be the scarcity of such forms. 



The Crag of the Gomer field seems to be, up to some height above 



Q.J.G.S. No. 215. 2 b 



