63 * 
ASTARTE trigonalis. 
TAB. CCCCXLIV.— Jig 1. 
Spec. Char. Cordato-triangular, depressed 3 
transversely sulcated; beak pointed; an- 
terior side separated by an angle, smooth. 
The posterior edge is concave near the projecting beak, 
and rounded into the front ; the sulci are numerous, not 
deep, they terminate at a ridge that defines the anterior 
side ; just before this ridge, the surface is rather con- 
cave ; the shell is thick. 
Not being able to clear away the stone from the inside 
of the only specimen that we have met with of this 
curious shell, it is not without some doubts that it is re- 
ferred to the Genus Astarte, but its external form agrees 
well with several species of that Genus. 
It is one of the treasures which Mr. Johnstone has 
kindly allowed to travel from his Cabinet, 
It was found at Dundry, 
