ANOMIA. 27 



Affinities. — This species is distinguished by the convexity and triangular form 

 of the valves, and by the broad and deep lunule. N. apiculata, Sowerby, was 

 regarded by the late Rev. W. Downes as a synonym of N. antiquata (see p. 24). 



Types. — In the British Museum. The specimens figured by Gardner (except 

 fig. 6, which is in the Downes Collection) are in the Bristol Museum. 



Distribution. — Blackdown Greensand (zones vii to x). 



3. Chalk Species. 

 Nucula, sp. Plate IV, figs. 27, 28. 



1897. Nucula, sp., H. Woods. Quart. Journ. G-eol. Soc, vol. liii, p. 378, 



pi. xxvii, figs. 1, 2. 



Remarks. — A species of Nucula is represented in the Montagu Smith Collection 

 (Woodwardian Museum, Cambridge) by eleven specimens ; it approaches closely 

 in form d'Orbigny's N. Benauxiana 1 found in the Turonian of Uchaux, but 

 unfortunately all the specimens are internal casts, so that an exact determination 

 is impossible. 



Measurements : 



Length . . . . .13 mm. 



Height . . . . . 10 „ 



Distribution. — Chalk Rock (Beussianum-zone) of Cuckhamsley. 



Family— ANOMIID^, Gray. 



Genus — Anomia, Linnseus, 1758. 



('Syst. Nat.,' ed. 10, p. 700.) 



1. Lower Cretaceous Species. 



Anomia pseudoradiata, d'Orbigny, 1850. Plate V, figs. 1 a — c, 2, 3. 



1S36. Anomia radiata, J. de C. Sowerby (non Risso). Trans. Geol. Soc, ser. 2, 



vol. iv, p. 338, pi. xiv, fig. 5. 



1 ' Pal. Franp. Terr. Cret.,' vol. iii (1844), p. 179, pi. ccciv, figs. 7—9. This is regarded by Pictet 

 and Campiche (Toss. Terr. Cret. Ste. Croix,' pt. iii [1866], p. 418) as a synonym of N. impressa, 

 Sowerby. 



