152 
SPIR1FER bisulcatus. 
TAB. CCCCXCI V.—Jigs. 1 and 2. 
Spec, Char. Semicircular, gibbose, longitudinally 
sulcated, elevated in the middle, a deep furrow 
on each side the elevation ; hinge line long, 
straight ; beaks close. 
But little wider than long. The furrows are about SO; 
two of them near the middle are much deeper than the 
rest, and the space between them is convex in some spe- 
cimens, but flat in others (see fig. 2), the space between 
the beaks is very long, flat, and has nearly parallel sides 
in consequence of the edges of it upon the deeper valve 
being reflected. 
From near Dublin. 
SPIRIFEIl distans. 
TAB. CCCCXCIV.- fig. 3. 
Spec. Char. Semicircular, gibbose ; sides sulcated 
longitudinally ; front elevated, elevation ex- 
tending to the beaks, concave along the mid- 
dle; beaks incurved, distant, the space between 
them curved, triangular. 
Ten or twelve furrows occupy the sides of this shell, 
the elevated part along the middle has no furrows ; the 
length is about two-thirds of the width. 
Much resembling the last, and also from Dublin. 
