152 CRETACEOUS LAMELLIBRANCHIA. 
field and Sandown; the Ferruginous Sands of Shanklin; the Carstone of Bon- 
church, etc.; the Hythe Beds of Hythe, Maidstone, Godalming, and Pulborough ; 
and the Sandgate Beds of Sandgate and Parham. I have not seen the specimens 
on which these records are based. 
Gault of Folkestone (zones i—ili, ix—xi), and Black Ven. Zone of H. inter- 
ruptus of Okeford Fitzpaine. Recorded by the Geological Survey from the Gault 
of Compton Bay, Culver, Blackgang, Niton, and Bonchurech, and from the Red 
Limestone of Hunstanton. Cambridge Greensand (derived from the Gault). Upper 
Greensand (zone of Schlenbachia rostrata) of Blackdown, Devizes, Ventnor, 
Selborne, and the Devon coast. Upper Greensand (zone of Peeten asper) of 
Haldon, Warminster, Ventnor, and Niton. 
Chloritic Marl of Maiden Bradley and Ventnor. Chalk Marl of Folkestone, 
Hamsey, Blue Bell Hill (Burham), Burwell, Madingley, and Hauxton. Ceno- 
manian of Wilmington. Lower Chalk (? Chalk Marl) of Stoke Ferry. Totternhoe 
Stone of Cherry Hinton, Fulbourn, and Burwell. Zone of //. subglobosus of Cherry 
Hinton. 
Prcren, sp., cf. Nitssont, Goldfuss, 1836. 
’ ] 0) ’ 4 ’ 
A species, apparently belonging to this group, has been found by Mr. R. M. 
Brydone in the Chalk of Trimingham; it has a smooth, or nearly smooth, thin 
shell, with nearly equal ears, and seems to agree with P. Nilssoni, Goldfuss,! but I 
am unable to say whether it possesses a byssal sinus as is shown in the figures of 
Goldfuss and Ravn. It also resembles P. membranaceus, Nilsson (see p. 149), but 
appears to have been proportionately longer, and has consequently a larger apical 
angle and smaller ears. Only three incomplete specimens have been seen, the 
lareest having a leneth of about 55 mm. 
to} (oI to) 
Sub-genus—Campronncres (Agassiz MS.), F. B. Meek, 1864. 
(‘Check List of Invert. Foss. N. America, Cret. and Jur.,’ Smithson, Mise. Coll. 177, pp. 28, 39.) 
Proren (Campronecres) cinetus, Sowerby, 1822. Plate XXVIIT; and Text-fig. 2. 
1822. Prcren crncrus, J. Sowerby, Min. Conch., vol. iv, p. 96, pl. ecelxxi. 
1825. — — Defrance. Dict. Sci. nat., vol. xxxvili, p. 254. 
1 Miiller (1827), p. 23, pl. x, fig. 12. Goldfuss, vol. ii (1836), p. 76, pl. xcix, fig. 8. Hennig (1897), 
p. 45, pl. iii, figs. 18, 19. Vogel (1895), p. 21, pl. i, fig. 17. Ravn (1902), p. 9, pl. ii, figs. 8—5. Bee 
also Romer (1841), Reuss (1846), Favre (1869), Geinitz (1872), Brauns (1876), Fritsch (1877-97), 
Behrens (1878), Griepenkerl (1889), Stolley (1892), Leonhard (1897). 
