128 
TROCHUS reticulatus. 
TAB* CCLXXIL— Fig. 2. 
Spec. Char. Conical, transversely reticulato-stri- 
ated ; whorls bicarinated ; base convex. 
The upper carina is more acute than the other and is 
placed half way between it and the upper edge of each 
whorl ; the numerous transverse elevated striie are con- 
nected by rather less elevated, short ones, which are 
slightly curved; the aperture is obtusely 4 angled; about 
as high as wide ; umbilicus closed. 
One figure represents a neat specimen of this Trochus, 
the shell of which is converted into sparry carbonate of 
Lime and filled with marie ; the other is from a cast of the 
inside, also marie not much indurated; they are both placed 
in the Wood wardian Collection by Professor Sedgwick, 
who found them at Ringstead Bay, near Weymouth, in 
the Kimmeridge Clay, and observed the same species at 
Portland Ferry in the same formation. An analogous 
species, with finer, and punctated rather than retiform 
striae occurs in Limestone at Gar sing ton near Oxford. 
