174 
AST ARTE lineata. 
TAB. CLXXIX. — Fig. l. 
Spec. Char. Obovate,, transvere, depressed, 
slightly truncated ; with a few concentric acute 
ridges,, and many minute intervening strias 
upon the surface ; lunette lanceolate., small ; 
margin entire. 
Almost lenticular; the anterior side is smallest and 
truncated : the slope upon which the cartilage lies is long 
and straight ; the shell is thin, about an inch wide, and 
has nearly thirty prominent sharp lines or ridges. 
It is with some hesitation that I give this as an Astarte, 
not having seen the hinge teeth it is probable that it will 
prove to be a Lucina. The only specimen known is filled 
with granular iron pyrites, and so liable to decompose, 
that I would not risk losing the opportunity of figuring it 
granted me by the Rev. Mr. Buckland : it was found in 
the selenite bed, in the Heddington Clay, near Oxford. 
