48 
Tliese are found in the softish Chalk at Warminster, and 
are sometimes of a fleshy red colour, like those found near 
St. Giles’s Gates, Norwich, but differ in the roundness and 
undulations ; perhaps among a great many specimens they 
might be found passing into each other. I could not get 
any one to show the inside. 
TEREBRATULA intermedia. 
TAB. XV.— F. 8. 
Spec. Char. Obscurely live sided, rather depressed 
smooth, larger valve most convex, front mar - 
gin undulated ; three depressions in the smaller 
valve, and two in the larger. 
An incli and half in diameter, the moderately deep undu- 
lations extend half way along the shells, the remainder of 
the valves are regularly convex. 
This species, from Cornbrach, was sent me by Thos. 
Meade, Esq. The circles of growth indicate a nearly 
straight truncation in the front, when very young, but it is 
distinctly undulated when full grown. It is commonly of 
a reddish brown colour. 
I have the same from Felmersham near Bedford, through 
the kindness of the Rev. T. O. Marsh. 
TEREBRATULA semiglobosa. 
TAB. XV.— F. 9. 
Spec. Char. Nearly circular, gibbous, smooth ; 
largest valve deepest and uniformly gibbous, 
front margin undulated, with two risings in 
the smaller valve. 
.About one inch long, width nearly as much. It is so 
gibbous as to be sometimes as deep as long. The undula- 
tion is remarkably conspicuous in a side or front view, 
though scarcely perceptible if viewed from the top or under- 
side, which the outline explains. 
These shells are from the harder Chalk near Warminster. 
They are generally filled or lined with very clear Quartz, 
and sometimes the outer part or shell is partly Quartz, and 
partly Chalk. Mr. Cunnington is the friend to whom I am 
indebted for them. 
