PLATE 5 (bis). 
Fig. 1. 
46. 3. MaCLUREA MAGNA. 
(Pag. 26.) 
] a. An obliquely vertical section of the fossil, passing nearly through the centre of the spire above, but more 
on one side below, so as to escape the umbilicus. 
1 4. A vertical section of the outer volution : a common appearance upon the weathered surface of the rock 
at Chazy. 
1 c. An unusually large specimen of the same species ; the surface worn so as to obliterate the stria;, and 
obscure the first volutions. 
% 
