ANOMIA. 31 



Measurements : 



Length . . . • .17 mm. 



Height . . . • • 12 „ 



Remarks. — This form may perhaps be related to A. yapyracea, d'Orbigny, but 

 without better specimens I am unable to make any definite statement con- 

 cerning it. 



Types. — I have not seen the specimen figured by Seeley, but other examples to 

 which he refers are preserved in the Woodwardian Museum, Cambridge. 

 Distribution. — Cambridge Greensand. 



Anomia papyracea, aVOrbigny, 1847. Plate V, figs. 13 — 16. 



184.7. Anohia papteacea, A. d'Orbigny. Pal. Franc. Terr. Cret., vol. iii, p. 755, 



pi. cccclxxxix, figs. 7 — 10. 



1850. Anomta papteacea, A. d'Orbigny. Prodr. de Pal., toI. ii, p. 171. 



1881. Anomia papteacea, A. d'Orbigny, var. bubwellensis, B. Etlieridge. In 

 Penning and Jukes-Browne, G-eol. Neighbourhood 

 of Cambridge (Mem. Geol. Survey), p. 145, pi. iii, 

 figs. 3, 4. 



Description. — Shell more or less oval, longer than high, nearly smooth, but 

 sometimes with faintly marked concentric ribs. Left valve slightly convex ; 

 umbo small, near the margin. Right valve flat or slightly concave. 



Measurements : 



(i) (2) (3) 



Length . . 33 . . 35 . .28 mm. 

 Height 23 . . 25 . . 21 „ 



Affinities. — This species is distinguished from A. laevigata, Sowerby, by its 

 oval form and lesser convexity. 



Types. — The type is not in the d'Orbigny Collection. The specimens figured 

 by Etheridge are in the Woodwardian Museum, Cambridge. 



Distribution. — Totternhoe Stone (zone of Holaster subglobosus) of Burwell and 

 Eeach . 



