126 CONTRIBUTIONS 
Observations. Smaller than the above, this species Has 
some resemblance to it. It differs in being a flatter shell, 
in being highly polished, and in having the outer lip thick- 
ened where it is in contact with the whorl. Immediately 
below the umbilicus there is usually a slight impression on 
the lip. 
T. lineata. Plate 4. Fig. 116. 
Description. Shell rather depressed above, rounded be- 
low, nearly covered with transverse elevated lines, smooth 
round the umbilicus; substance of the shell thin ; suture 
furrowed; umbilicus rather large, round; whorls four ; 
mouth round; outer lip edged. 
Length .1, Breadth 3-20ths, of an inch, 
The smaller figure is of the size of nature. 
Observations. This minute species differs from the pre- 
ceding, in having transverse lines and a wide furrow 
along the suture. ‘The whorls are also more rounded. 
The genus Turbo has been observed in Great Britain, 
as low down as the Mountain Limestone, and through 
nearly all the superincumbent strata to the Crag. Eigh- 
teen species are mentioned by Sowerby, Phillips and Bran- 
der, two only being in the London Clay. M. Deshayes’s 
Tables give thirty-four for the Tertiary, sixteen being in 
the Eocene of the Paris basin alone. In this country 
there have not been before, that I am aware of, any of the 
Turbones noticed in our formations. 
