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perfect in any of the specimens I have seen that appear 
full grown. 
Highgate Hill is the only part of the London Clay stratum 
that has furnished me with this new shell*, which was found 
in the attempt to form a Tunnel through it. The shell is 
usually of a yellowish brown color with a shining fresh 
appearance, but generally mutilated and rather brittle. 
The form of the spire so much resembles the young shells 
of Brander’s Murex rimosus, figured in this plate, that 
without comparison it has often been confounded with it; 
when compared they are readily distinguished by the 
obtuseness of the cost, the gloss of the surface, and the 
flatness of each whorl in the Highgate shell. The R. rimosa 
has never been found at Highgate, although many of the 
other Hampshire shells have, nor does it appear that 
R, lucida has been found in Hampshire. 
ROSTELLARIA rimosa. 
TAB. XCI.—Figs. 4, 5, and 6. 
Spec. Cuar. Fusiform, whorls slightly convex, 
longitudinally ribbed, transversely striated ; lip 
reflected, with a sinus at the inferior edge 
below an expansion of the margin, and a canal 
at the superior edge extending nearly the length 
of the spire; beak straight. 
Syn. Murex rimosus. Brander Fossil. Hant. F. 29. 
Is general the surface is glaucous, the stria upon it are 
more distant and stronger near the beak; the ribs are 
* Mutilated specimens have been since found, though rarely, in sinking 
the shaft near White Conduit House, Islington, accompanied by subjects 
not found at Highgate, 
