202 
Spec. Cuar. Ovate ; with four rows of erect tubes 
alternating with four solitary tubes upon each 
whorl ; aperture obovate, entire ; beak arched, 
closed. 
ET 
~ 
V otvrions convex and smooth, each furnished with four 
or five longitudinal rows of tubular spines, generally 
three in a row; between each row is a solitary erect 
slightly arched tube, placed upon the upper part of the 
whorl. The beak is rather pointed, closed at the front, 
but open at the end. 
It is remarkable that Brocchi should have mentioned 
Lamarck’s M. pungens as related to his M. fistulosus ; 
while he has described M. pungens under the new name 
of horridus, in nearly the same terms as those used by 
Lamarck, without referring to him. Brocchi seems to 
have had finer specimens than are found in Hampshire, 
although it is probable that they come from a distant part 
of the same stratum, and consequently may have been 
buried at nearly the same period : is it not likely that one 
part of a stratum may have been in a situation more con- 
genial to the growth of the individuals it has enveloped 
than others? The more perfect state of preservation in 
which many of the foreign fossils are now obtained, 
probably arises from the climate in which they are ex- 
posed: that of England, especially by the sea-side, 
being more calculated for the destruction than the pre- 
servation of tender calcareous reliques. 
The specimens numbered 3, 4, and 5, are from Bar- 
ton ; the two former through the kindness of Miss Salis- 
bury; the latter, which is a young one, before the beak 
is closed, was sent me by the Rev. Mr. Bingley. 
Figs. 6, 7, and 8, are from young shells found at 
Highgate: although they are nearly as large as fig. 5, 
the rows of tubes are not formed, but the solitary tubes 
are commenced : in fig. 8, which is the smallest, there 
are several indications of the first tube upon the varices. 
Had a larger extent of ground been opened, it is possible 
we might have come to the bed where this species had 
attained its full growth. 
