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CRETACEOUS L.UIELLIFiRAXCHIA. 



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Fiii. 'M. — Inoccriiiiius involntus.Sow. Upper Chalk, probably Kent. British Museum, No. Li'Jl". Posterior 

 view. Uinboiial part of left valve missing. Natural size. 



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KiG. 91.— Anteririr view of specimen shown in Fig. 90. Natural size. 



