PLATE 36, 37. 
FIG. 4. 
CONCHYLIOLITHUS Anomites (Crumena) scro- 
tiformis, sulcis longitudinalibus subobsolescentibus, 
margine sinu 3-plicato. S. p. 
A fossil shell. The original an Perforate. Valves 
convex, purse-like ; or bellied and gradually increasing in 
size, from the beaks to the opposite extremity. Hinge 
curved, compact. Foramen oblong, very minute, (rarely 
visible) situate under the apex of the larger beak, which is 
sharp-pointed and incumbent. The surface of the shell 
longitudinally furrowed ; the furrows few, not more than 
ten or twelve, deep at the margin, but gradually becoming 
indistinct, as they approach the' beaks. The three central 
furrows form, in the smaller valve, a convex wave; 
answered, in the other valve, by a concave one ; both ter- 
minating in a deep, three-plaited sinus at the margin. 
Not so common as the foregoing. Our specimen from 
Winster, Limestone. 
This species, in form, approaches near to that division of 
Anomit^e which has the beak tubular and perforated at the 
point; and, without some attention, is readily mistaken for 
one of that tribe; particularly when the beak is broken 
and imperfect. 
R 
