46 



Guide to the Invertebrata. 



GALLERY A mass of rock of Lower Eocene age from Fareham, Hants, 



VIII. 

 "West Side. -^"^^ ^^ ^^^ shells of Pinna affinis, and another from the same 



Slabs near fo^™^^^o^ ^i^^ shells of Axincea brevirostris, etc., are placed 



Wall-cases between Wall-cases 4 and 5. 



Opposite Table-case 98, is a fine slab of " Bognor Rock" from 

 the Lower Eocene of Sussex, largely composed of shells or the 

 casts of shells of Cardita Brongniarti, Axincea hrevirodris, Modiola 

 elegans, Valuta denudata, Pyrula Smithi, Natica Hantoniensis, and 

 Vermetus Bognoriensis. 



Table- 

 case 99. 



Ceetaceous Mollusca. — The British Cretaceous series of shells 

 is rich in specimens described by Mantell, S. Woodward, Sowerby, 



Fig. 84. — Spondyliis spinosus, Sby. Upper Cbalk : Gravesend. 



Table- 

 case 98. 



etc. Notice the fine series of Inoceramtis from the Chalk — 

 Table-case 99 and Wall-case 5a. This genus is only met with in 

 the Secondary period. Specimens of Inoceramun Cuvieri measure 

 18 inches across. Other Chalk species are Spondylus spinosus 

 (Fig. 84) and Neitliea quinquecostata (Fig. 86). 



There is a beautiful series of silicified shells from the Blackdown 

 beds of Devonshire placed in Table-case 98. The shells from 

 the Gault of Folkestone, from Black Ven, near Lyme Regis, 

 from Okeford Fitzpaine, Dorset, deserve attention; the Scalid^ 



