204 CRETACEOUS LAMBLLIBRANCHIA. 



Marne), Brillon (Mouse), St. Sauveur and Auxerre (Yomie). The specimens 

 figured by Keeping are in the Sedgwick Museum. 

 Distribution. — Lower Greensand of Upware. 1 



Cardium, sp. Plate XXXII, fig. 12 a, b. 



Internal casts of a globose form of Card linn occur in the Lower Greensand of 

 Seend and Faringdon. On one specimen (No. 21272, Museum of Practical 

 Geology) a portion of the shell is preserved, and its ornamentation resembles that 

 of G. lbbetsoni and G. Cottaldinum. The form of the shell seems to be rather more 

 like that of G. lbbetsoni than of G. Guttaldlnnm. 



Cardium, spp. 



Specimens of Cardium from the Cenomanian of Dunscombe, South Devon, were 

 referred by C. J. A. Meyer to C. altemans, Reuss, and C. alutaceum, Goldfuss. 

 Better preserved specimens are needed before these determinations can be con- 

 firmed. 



Cardium turoniense, Woods, 1807. Plate XXXII, figs. 13 — 15. 



1897. Cardium turoniense, if. Woods. Quart. Journ. Geol. Soc, vol. liii,p. 389, 



pi. xxvii, figs. 20 — 22. 



Description. — Shell small, oval, higher than long, inequilateral, much inflated, 

 postero-dorsal part compressed. Umbones prominent, with a considerable anterior 

 curvature. Ornamentation consists of many strong radial ribs. Length, 6 mm.; 

 height, 7 mm. 



Affinities. — This species shows some resemblance to G. cenomanense, d'Orbigny, 2 

 but is more inequilateral owing to the much greater curvature of the umbones ; 

 also the ribs are less numerous, and tubercles appear to be absent from the 

 grooves. 



Type. — In the Sedgwick Museum, Cambridge. 



Distribution. — -Chalk Rock of Cuckhamsley. 



1 Some small specimens fouud in the Ferruginous Sands of Shanklin may perhaps be referred to 

 C. Cottaldinum, but they are too imperfectly preserved for exact determination. 



2 'Pal. Frauc. Terr. Oct.,' vol. iii (1844), p. 37, pi. ccxlix, figs. 5 — 9. 



