62 
CRASSATELLA sulcata, 
TAB. CCCXLV. — Fig. 1. 
Spec. Char. Ovato- elongated, transversely 
sulcated ; anterior side produced, obliquely 
truncated, defined by a ridge ; edge toothed 
within. 
var. /3, sulci broad, lost upon the anterior side, 
Syn. Tellina sulcata. JBrander , 89. 
This may be considered either as sulcated or costated, 
for the sulci are deep and rounded, equal to, and precisely 
the reverse of the spaces between them, that is in var. a ; 
in /3 they are broader and shallower, and the spaces be- 
tween them assume the form of small and but slightly 
elevated ribs, that are lost as they pass over the ridge 
bounding the anterior side, while in /3 they are reflected 
at an acute angle, and pass over that ridge : the var. /3 is 
also a wider, more depressed and delicately formed shell : 
the teeth of the hinge are perpendicularly striated in, 
both, and the anterior side pointed. 
This is quite a distinct shell from Peron’s and La- 
marck’s recent C. sulcata from New Holland, although 
possibly the latter author may consider it a variety, but 
he does not quote Brander, whose shell is entitled by 
priority to the name sulcata, so that Lamarck’s requires 
a new one. The one before us is a common shell at 
Barton, nor does it appear that one variety is more 
common than the other. 
CRASSATELLA plicata. 
TAB. CCCXLV. — Fig. 2. 
Spec. Char. Oblongo-ovate, concentrically 
and minutely plicated ; plicae reflected ; an- 
terior side defined by an obtuse ridge, ob- 
scurely truncated ; margin toothed within. 
A very neat and I believe new species ; the anterior 
side is less produced and not so strongly defined as in 
sulcata ; its truncation is also longitudinal, not oblique ; 
the teeth are similarly striated. 
Found in a bed of clay eleven feet thick and twenty- 
one from the surface, in a well dug at Bartley Lodge, 
Stone Cross, near Southampton, and presented to me 
by the Son of the worthy proprietor of that seat, Charles 
Lyeil, Esq. 
