BIVALVIA. 



67 



ARCA UNDATA. Broc. Conch. Foss. Subap., p. 489, 1814. 

 POLYODONTA. Broc. - - p. 490, 1814. 



FLAMMULATA. Renieri. fide Philippi. 



GLYCIMERIS ORBICULARIS. Da Costa. Brit. Conch., p. 168, p. 11, fig. 2, 1778. 

 PECTUNCULUS GLYCIMERIS. Turt. Brit. Biv., p. 171, t. 12, fig. 1, 1822. 



Brown. Illust. Conch. Gr. Brit., pi. 25, figs. 8, 9, 1827. 



Crouch. Int. Lam. Conch., pi. 8, fig. 11, 1827- 



Reeve. Conch. Icon. Pectunc., pi. 3, fig. 12. 



Dujard. Mem. Geol. Soc. de Fr., t. ii, par. 11, p. 267, No. 1, 



1837. 

 Forb. and Hani. Hist. Brit. Moll., vol. ii, p. 245, pi. 46, 



figs. 47, 1849. 

 PILOSUS. Turt. Brit. Biv., p. 172, t. 12, fig. 2, 1822. 



Schum. Essai d'un Nouv. Syst. des Vers. Test., p. 172, pi. 19, 



fig. 3, 1817. 



Brown. Illust. Conch. G. B., pi. 25, figs. 10, 11, 1827. 

 Blainv. Man. Malac., pi. 65 bis, fig. 3, 1825. 

 Reeve. Conch. Icon. Pectunc., pi. 3, fig. 13. 

 G. Sowerby, Jr. Conch. Man., fig. 134, 1843, 

 G. Sow. Genera, No. 5, fig. 1. 

 S. Wood. Mag. Nat. Hist., 1840, p. 13, fig. 7. 

 Nyst. Coq. Foss. de Belg., p. 247, pi. 19, figs. 6, 7, 1844. 

 UNDATUS. Turt. Brit. Biv., p. 173, t. 12, figs. 3, 4, 1822. 

 DECUSSATUS. Id. p. 173, t. 12, fig. 5. 



NUMARIUS. Turt. Brit. Biv., p. 174, t. 12, fig. 6, 1822. 

 VARIABILIS. J. Sow. Min. Conch., t. 471, fig. 1, 1824. 

 Woodward. Geol. of Norf., p. 43, 1833. 

 Id. Coq. Foss. de Belg., p. 249, pi. 20, fig. 1, a b, 1844. 

 Phil. En. Moll. Sic., vol. ii, p. 45, 1844. 



POLYODONTA. Goldf. Pet. Germ., vol. ii, p. 161, t. 126, figs. 6 & 7, a d. 

 PULVINATUS. Brongn. Vincent., p. 77, pi. 6, figs. 15, 16, 1823. 

 1 Bast. Bord. Foss., p. 77, No. 2, 1825. 

 ? Dubois de Mont. Conch. Foss. de Wolhyn., p. 64, pi. 7, 



figs. 7, 8, 1831. 



suBOBLiauus. S. Wood. Mag. Nat. Hist., 1840, p. 233, pi. 13, fig. 6. 

 TRAKSVERSUS. ? Dubois de Mont. Coq. Foss. de Wolhyn., p. 65, pi. 7. fig. 9. 

 NUMIFORMIS. 1 Id. p. 66, pi. 7, fig. 6. 



LATIAREA. Michelotti. fide Sismonda. 



PUSILLTJS? Dujard. Mem. Geol. Soc. de Fr., t. 2, pt. 2, p. 276, 1837. 



Ency. Method., p. 310, figs. 2 & 3. 

 ARCA. Smith. Strat. Identif. Craig, t. 2, fig. 7, 1816. 



Spec. Char. Testa variabile, suborbiculatd, subovatd, transversd, s&pe obliqud sub- 

 (Equilaterd, compressd vel tumidd, costato-striatd ; margine crenulato. 



Shell variable, suborbicular, elongate or transverse, often oblique, subequilateral, 

 compressed or tumid ; striated ; margin crenulated. 



Diameter, 3^ inches. 



