and on Scaphites Gigas. 41 1 



The Scaphites obtained by Mr. Bowerbank is the Hamites Gigas of 

 Mineral Conchology, t. 593, which must now be called Scaphites Gigas, 

 (see PI. XXXIV. fig. 2.) The involute portion resembles the inner whorls of 

 the shell just described, but it is upon the straight portion only that the 

 large ribs appear, which moreover have three knobs upon each. This is the 

 third species of large Scaphites which has fallen under my notice. I have 

 seen several portions similar to the figure in Mineral Conchology, mostly found 

 near Maidstone, but this is the only specimen showing the involute com- 

 mencement which I have met with, and I for some time considered it to be 

 an undescribed species. 



I remain, dear Sir, 



Your obedient servant, 



J. D. C. SOWERUY. 



January 1 8tli, 1 837. 



-SECOND SERIES. 3 H 



