A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) . Fig, 70.—A Lamellibranch shell, Spondyltts spinosics, common ;in theSenonian Chalk of England. Natural size. Table-case A beautiful series of silicified shells from Blackdown andHaldon in Devonshire, a set from the Eed Chalk of. Fig. 71.—Cretaceous Lamellibranchs. a, Neithea quinquecostata, commonin Senonian Chalk; b, Actinoceramus sulcatus, from the size. Hunstanton in Norfolk, and another from the CambridgeGreensand, are all of Albian age. Of the s
A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) . Fig, 70.—A Lamellibranch shell, Spondyltts spinosics, common ;in theSenonian Chalk of England. Natural size. Table-case A beautiful series of silicified shells from Blackdown andHaldon in Devonshire, a set from the Eed Chalk of. Fig. 71.—Cretaceous Lamellibranchs. a, Neithea quinquecostata, commonin Senonian Chalk; b, Actinoceramus sulcatus, from the size. Hunstanton in Norfolk, and another from the CambridgeGreensand, are all of Albian age. Of the same age are the MOLLUSCA (except CEPHALOPODA). 133 shells from the Gault clay of Eolkestone, of Black Ven, GalleryCharmouth, and of Okeford Fitzpaine also in Dorset, all are on the other side of the Case. Among theGastropods the Aporrhaidse with their winged lips and theScalariid?e with their transverse ribs furnish the moststriking forms. Among Lamellibranchs one may noticespecies of Actinoceramus (Fig. 71 l), Trigonia, Cumllsea,Liojnstha [Thetis], Thracia, Pinna, Ferna, and Pi-otocardia. During the Aptian age was deposited the Lower Green- Table-casesand of Hythe, Sandgate, and Faringdon. Here are casts the borings made by Lithodonms and Pholas. Plcuroto-maria gigantea, Alcctryonia niacroptera, and Toucasia Lons-dalei are notewort
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