250 CRETACEOUS LAMELLIBRANCHIA. 



Type. — From the Hytlie Beds of Piilborongli . A specimen which is believed to 

 be the type, but wliich is more crushed dorso-ventrally than is indicated by the 

 figure, is in the Museum of the Geological Society (No. 2197). 



Distribution. — Lower Greensand {Perna-heA and Crackers) of Atherfield. 

 Hythe Beds of Pnll)orough. 



Pholadomya Fabuina, (VOyhiijinj, 1845. Plate XLI, fig. G. 



1845. Pholadomya Fabrina, A. d'Orbiyny. Pal. Fran9. Terr. Crt't., vol. iii, \>. 



354, pi. ccclxiii, figs. 6, 7. (Non 

 P. Favrina, Agassiz, Pictet and 

 Roux.) 

 1850. — — d'Orbigny. Prodr. de Pal, vol. ii, p. 135. 



1865. — — F.J. Pictet and G. Campiche. Foss. Terr. Crct. Ste. 



Croix (Mak'r. Pal. Suisse, ser. 4), p. 92. 

 1897. — Favbina?, B. B. Newton. Proc. Dorset Nat. Hist, aud 



Antiq. Field Club, vol, xviii, 

 p. 92. 



? Non 1874. — Fabbina, C. Moe.n-Ji. Mon. Pholadomyeu, p. 94, pi. xxxii, fig. 1. 



RemarJis. — Some crushed specimens found in the Gault are probably examples 

 of P. Fabrina, d'Orbigny. They resemble P. Marti iii, but have coarser and more 

 distinctly tiiberculate ribs, and the concentric rings appear to be more conspicuous. 



Distribution. — Gault of Black Ven, Okeford Fitzpaine, and Folkestone. 



Pholadomya decussata (Muntell), 1S22. Plate XLI, figs. 7—9; Plate XLII, fig. 1. 



1822. Cabdium ? DEcussATUM, G. Mantell. Foss. S. Downs, p. 126, pi. xxv, fig. 3. 

 1827. — — /. de C. Sou-erhy. Miu. Conch., vol. vi, p. 99, pi. 



dlii, fig. 1. 

 1837. — — A. Gold/uss. Petref. Germ, v.il. ii, p. 222,pl. cxlv, 



fig. 2. 



— Pholadomya decussata, G. G. Pitsc/i. Polens Paliiout., p. 87. 



1841. Cardium DECUSSATUM, F. A. Rijmer. Die Versteiu. d. uord-deutsch. 



Kreidegeb., p. 71. 

 1846. Pholadomya decussata, A. E. Beuss. Die Verstein. der bohni. Kreide- 



format., pt. 2, p. 17. 

 1850. — — J. de C. Sorverhy,'mF. Dixon. Geol. Sussex, p. 355 



(p. 385, ed. 2), pi. xxix. fig. 6. 



— — — H. B.Geiiiitz. Das Quadersaudst. oder Kreidegeb. 



in Deutschlaud, p. 146. 



— — — J?. Kiier. Yerstein. d. Kreideniergels v. Leniberg 



(Haidinger's Naturwiss. Abhaudl., 

 vol. iii, pt. 2), p. 24. 



