TEREBRATULA rostrata. 
TAB. DXXXVIL —figs. 1 $ 2. 
Spec. Char. Suborbicular, gibbose, plaited ; plaits 
many,, rounded ; beak large produced,, slightly 
incurved, pointed ; front slightly elevated. 
Until nearly full-grown the elevation of the front in 
this species is scarcely perceptible, and then it is not 
very regular. The inner surface of the beak is more 
convex than is common ; the plaits amount to nearly 30. 
Sent from Sussex many years ago by G. A. Mantell, 
Esq. probably found in the same marl-pit, at Hamsey, 
as the T. Pisum. Fig. 2. exhibits a distorted specimen. 
TEREBRATULA truncata. 
TAB. DXXXVII.- -fig. 3. 
Spec. Char. Semicircular, plaited ; plaits sharp, 
from 9 to 20, some of them forked ; front 
elevated with from 1 to 5 plaits ; hinge line 
straight, equal to the width of the shell ; lesser 
valve nearly flat, the other subconical with a 
large straight beak which is flat in the front. 
A large round aperture in the beak and an extended 
hinge line give this fossil a peculiar truncate appear- 
ance ; and, together with the large often antiquated 
plaits, render it easily distinguishable. Were it not for 
the aperture in the beak and the internal structure, 
which is fortunately well preserved, it might be taken 
for a Spirifer. 
Hitherto only found at Farringdon. The specimens 
are furnished by H. H. Goodhall, Esq. and Gerrard 
E. Smith, Esq., two gentlemen who derive much grati- 
fication from the pursuit of Fossil Shells : — to the former, 
geologists have long and frequently been indebted. 
