106 FOSSILS FROM THE UPPER GREENSAtfD. 



shell in the lower part of the Upper Greensand. In the top rock 

 of North Dorset it occurs with the shell preserved in phosphate ; 

 and with it is another variety or species, which is sharply keeled on 

 the anal side, having also a second smaller keel or ridge between 

 the larger keel and the hinge line. This comes nearer to Area 

 cequilateralis (Briart and Cornet) from the Meule de Bracquegnies 

 than to any other figured form. 



Cardita cottaldina (?), d'Orb., Pal. Franc. Terr. Cret., Vol. III., 

 PI. 269, fig. 6-8. An inflated species of Cardita is common among 

 the Dorset phosphates, and I have provisionally referred it to 

 G. cottaldina, though it has also some resemblance to the C. rotundata 

 of Pictet and Roux (Gres Verts., PI. 33, fig. 6). 



The shell itself is not unfrequently preserved in phosphate, but 

 the outer surface is seldom in good condition. It is thick, inflated, 

 and squarish, and the umbones are near the anterior border ; in all 

 these respects it differs from C. tenuicosta, which is an oval shell, 

 thinner and shallower, and with more delicate costse than C. cot- 

 taldina. 



Cardium alutaceum, Miinst, in Goldfuss Petref. Germ. Tab. 144, 

 fig. 5. There are three specimens of a peculiar Cardium in the 

 collection at Dorchester, and in one of them the shell is partly 

 preserved, showing a series of close set radiating ribs, each one 

 bearing a number of small even-sized tubercles. 



So far as one can judge by comparing the specimen with the 

 figure of C. alutaceum, it seems to agree with that species. It may 

 also be mentioned that Mr. Meyer possesses specimens of a Cardium 

 from the Cenomanian of the Devon coast (zone of Am. Mantelli) 

 which he refers to the same species. It has not been recorded 

 from any other locality in England. 



Rhynchonella Mantelliana, Sow. This is essentially a Chalk 

 marl species, but it does occur occasionally in the Greensand of 

 Chute and Bye Hill, near Warminster. Those in the correspond- 



