83 
TRIGONIA spectabilis. 
TAB. DXLIV. 
Spec. Char. Suborbicular, rather elongated, con-* 
vex, nearly smooth, ornamented with about 
seven bent rows of large round tubercles upon 
the anterior side, and a few small ones scatter- 
ed over the posterior side ; one row of com- 
pressed tubercles upon the posterior slope. 
Both the anterior and posterior slopes are straight, and 
meet in a right angle at the beak : there is a slight lon- 
gitudinal rather square elevation of the surface, that 
divides it into two nearly equal parts ; on one side of 
this the rows of partly connected tubercles end, on the 
other are the scattered small ones. This seems to be 
distinct from Trigonia nodosa t. 507. f. 1, as it is more 
completely covered with knobs and is of a shorter shape. 
A very handsome cast in Silex imbedded in Sandstone, 
found at Blackdown. It is one of the many rare fossils that 
enrich the cabinet ofH. H. Goodhall, Esq. It is so well 
displayed that I was delighted with the opportunity of 
figuring it, although the surface is so delicate that it has 
not been possible to do it justice. 
