ANOMIA. 29 



A. intercostata, Zittel. 1 The ornamentation in this form resembles that of A. sub- 

 radiata, Reuss, 2 but in that species the shell appears to be less inequilateral. 



Remarks. — I have seen only two examples of this form; it appears to be quite 

 distinct from the other English species, and to resemble most A. subradiata, 

 Reuss, from the Pliinermergel of Luschitz. 



Distribution. — Crackers of Atherfield. 



Anomia laevigata, Sowerby, 1836. Plate V, figs. 6, 7 a, b, 8 a, b, 9. 



, 1836. Anomia laevigata, J. de C. Soiverly. Trans. Geol. Soc, ser. 2, vol. iv, 



p. 338, pi. xiv, figs. 6 a, b. 

 ? 1S47. — —A. d'Orbigny. Pal. Franc. Terr. Cret., vol. iii, p. 755, 



pi. cccclxxxix, figs. 4 — 6. 

 1850. — Prodr. de Pal., vol. ii, p. 84. 



1854. — J. Morris. Cat. Brit. Foss., ed. 2, p. 161. 



Description. — Shell regular, nearly orbicular ; surface smooth except for lines 

 of growth. Left valve moderately convex; umbo small, at or near the margin. 

 Measurements : 



(i) (2) (3) 



Length . . 36 . . 22 . . 14 mm. 



Height 32 . . 21 . . 13 „ 



Types. — One of the types (PI. V, fig. 6, and Sowerby's fig. 6 a), from the Hythe 

 Beds of Lympne, is in the Museum of Practical Geology (No. 6414) ; I have not 

 seen the other. 



Distribution. — Ferruginous Sands (upper beds) of Shanklin ; Atherfield Beds 

 of Peasmarsh ; Hythe Beds of Lympne; Lower Grreensand of Punfield. 



Anomia convexa, Sowerby, 1836. Plate V, figs. 10 a, b. 



1836. Anomia convexa, J. de C. Sowerly. Trans. Geol. Soc, ser. 2, vol. iv, 



p. 33S, pi. xiv, fig. 7. 

 1854. — —J. Morris. Cat. Brit. Foss., ed. 2, p. 161. 



Description. — Shell rather small, more or less orbicular or quadrate ; surface 

 smooth, or with fine ribs. Left valve very much inflated, with a rather prominent 

 umbo. 



1 ' Die Bivalven der Grosaugeb.,' pt. ii (1866), p. 51, pi. xix, fig. 10. 



2 'Die Verstein. der bohm. Kreideformat.,' pt. ii (1846), p. 45, pi. xxxi, figs. 18, 19. 



