13 
MUREX striate* 
TAB* CIX. 
Var. a ( carinatjus ) having three or four of the 
transverse projections more prominent than 
the rest, especially the upper ones. 
There have been found recent shells very similar to this, 
and bearing the same relation to M. antiquus, Linn . (M» 
despectus, Penn.) as this does to my M. striatus, tab. 22, 
such appears (o be the M. carinatus, Penn. 1 have a 
recent specimen somewhat carinated, and among a number 
of Fossil ones a complete series is easily selected. These 
Fossils have often been taken for the same species as the 
recent M. carinatus, but an attentive view of the propor- 
tions of the spire and the last whorl will readily distinguish 
all the varieties: the recent one having a longer spire, 
more like M. contrarius, tab. 23. which also is liable to 
the same carinated variation of form, but in a less degree 
and more rarely. I have endeavoured to show some va- 
riety with the younger shell, selected by Mrs. Cobbold 
from the same pit as M. striatus and M. contrarius, formerly 
figured, and with which the least carinated ones had been 
arranged in pairs. I have also had great variety from the 
Rev. G. R. Leathes and other Suffolk friends. 
Fig. 1 is a moderate sized specimen ; fig. 2 shows al- 
most all the projections rather broad ; in fig, 3 they ar@ 
more regular ; and in fig. 4 they are monstrous, and the 
beak is elongated : fig. 5 is a young shell. 
