204 CRETACEOUS LAMELLIBRANCHIA. 



Mai'ne), Brilloii (Mouse), St. Sauveur and Auxerre (Yonue). The specimens 

 figured hy Keeping are in the Sedgwick Museum. 

 Distribution. — Lower Greensand of Up ware. ^ 



Caediuji, s]). Plate XXXII, fig. 12 a, h. 



Internal casts of a globose form of (Jarduiiii occur in tlie Lower Greensand of 

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

 Geology) a portion of the shell is (ii'eserved, and its oi-nanientation resembles that 

 of G. Ihhetsoiii and G. Cottaldinuin. The form of tlie shell seems to l)e rathei- more 

 like that of (J. llihctsonl than of G. Gotlaldiinini. 



Cabdium, spp. 



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

 referred by C. J. A. Meyer to G. alternans, Reuss, and G. alufacemn, Goldfuss. 

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

 firmed. 



Cahdium turuniknse, WouJh, 1SV)7. Plate XXXII, figs, lo — 15. 



1897. Cakdium TUKoNiEN.SE, i/. Wooils. Quart. Jouiu. Geol. Soc, Vol. liii, p. 389, 



pi. xxvii, figs. 20-22. 



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

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

 curvatui'e. Ornamentation consists of many strong radial ribs. Length, (imni.; 

 height, 7 mm. 



Ajjinitles. — This species shows some resemblance to ('. o'/M'/z/ffHcz/sc, d'Orbigny,- 

 but is more inequilatei'al owing to the much greater curvature of the umbones ; 

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

 grooves. 



Type. — In the Sedgwick Museum, Cambridge. 



Distribitfioii. — Chalk Rock of Cuckhamsley. 



1 Some small specimens found iu the Ferruginous Sands of Slianklin may perhaps be referred to 

 C. CollahUnnm, but they are too imperfeelly preserved for exact determination. 

 - 'Pal. Frauy. Terr. CrJt.,' vol. iii (1844), p. 37, pi. ecxiix, figs. 5—9. 



