THE COKALLIAN KOCKS OF ENGLAND. 



379 



extraction. Nevertheless a fine body of fossils, without enume- 

 rating the teeth of Eeptilia, have been proved here, aud the list of 

 Rag-fossils occurring in this district is pretty nearly a list of the 

 fossils from this subdivision of the quarry. The lowest portion 

 consists of alternations of hard and soft Eag having a thickness of 

 about 6 ft. : this is moderately shelly, and contains numerous spines 

 of Cidaris florigemma. Above these occurs the great shell-bed, 

 about 3 ft. thick ; it is a mass of the most splendid fossils, all of 

 them the finest and largest of their kind. The small univalves so 

 frequent in other parts of the Eag are not common here, the fauna 

 being essentially megalomorphic. Lima Iceviuscula (var.) is the 

 prevailing shell. The species of corals are those found elsewhere in 

 Yorkshire ; but Thecosmilia and Rhabdophyllia are most frequent. 



Subjoined is a list of the fossils of the Eag, or Upper Corallian, of 

 the Langton-Grimston district : — 



Belenmites abbreviates, Mill. 

 Nautilus aganiticus, Schlot. 

 Ammonites varicostatus, Bitcld. 



(var. of A. plicatilis). 

 alteraans, Von Buck (A. 



cordatus, var.?). 



vertebralis, Sow. (same var. 



r. 

 r. 



r. 

 v.c. 



as at Sike Grate). 

 Purpuroidea nodulata, Y. <$? B. 

 Natica grandis, Munst. (? cincta, 



Phil.). 



clio, 1)' Orb. (?arguta, Phil.). 



Cbemnitzia, Tar. of bedding- 



tonensis, Sow. 



pollux, I)' Orb. 



langtonensis, Bl. Sf H. 



JVerinaea tornatella, Buvig. 



- fasciata, Voltz. 

 Littorina pulcberrima, Dollf. 



muricata, Sow. 



Nerita, sp. 



Neritopsis Guerrei, Heb. Sf Desl. 



, sp. 



Trocbus, sp. 



Turbo corallensis, Buv. 



Pleurotomaria reticulata. 



■ Moreana?, Buvig. 



Trochotoma tornata, Phil. (T. 

 discoidea, Buvig.). 



Alaria, sp. (cf. tridactyla, Buv.). 

 v.c. Ostrea duriuscula, Phil, 

 v.c. Exogyra nana, Sow. 



, sp. 



Ostrea gregaria, Sow. 

 c. Anomia radiata, Phil. 

 r. Plicatula, sp. (cf. fistulosa, M. Sf 



Pecten vimineus, Sow. 



insequicostatus, Phil. 



intertextus, Bom. 



v.c 



Pecten lens, Sow. 

 c. Hinnites (very large). 

 v.c. Lima laeviuscula, Sow. (N.-Grim- 

 ston variety). 



c. rigida, Sow. 



v.c. J pectiniformis, Schlot. 



\ rudis, Sow. 



, sp. (cf. elliptica, Whit.). 



subantiquata, Bom. (small). 



r. Avicula aedilignensis, Bl. 

 c. Trichites Plotii, Lhwyd. 



Mytilus ungulatus, Y. Sc B. 



Modiola inclusa, Phil, 

 c. Area quadrisulcata, Sow. 



pectinata, Phil. 



Cucullsea elongata, Phil, 

 r. Trigonia (costate sp.). 



*Protocardium isocardioides, Bl. & 

 H. 

 v. c. Astarte ovata, Smith (attaining a 



great size). 

 c. rbomboidalis, Phil. 



Opis virdunensis, Buvig. 



lunulata, Bom. 



Pbillipsi, Morr., or coralliua, 



Damon. 



Panopaea gigantea, Buvig. 



Homomya crassiuscula, M. Sf L. 



Goniomya v-scripta, Sow. 



Terebratula insignis, Schilb. 

 c. Cidaris florigemma, Phil. 



c. Smitbii, Wright. 



c. Hemicidaris intermedia, Flem. 

 v.c. Pseudodiadema hemispbarieurn, 

 Ag. 



Collyrites bicordatus, Leske. 

 c. Pygaster umbrella, Ag. 



Echinobrissus scutatus, Lamlc. 



Pentacrinites, sp. 



Apiocrinus, sp. 



* This is probably the Cardium lobatum of Phillips. 

 isocardina, Buvig. x. 40. 



Also cf. Cypricardw 



