GASTEROPODA. 31 
Length, =%sths of an inch. 
Locality. Red Crag, Waldringfield. 
The specimen figured has been obligingly sent to me by Mr. Canham. It is in good 
preservation, deeply coloured with Red Crag, and it appears to me not to be a derivative. 
I have a fragment from the Coralline Crag near Orford that may probably be the same 
species. 
The shell to which it appears to approach the nearest (judging from figure and 
description) is Murex Haidingeri, Hornes, ‘Vienna Foss.,’ vol. i, p. 228, tab. xxi, 
fio. 12; but I think it is distinct. It differs from MM. fortwosus, the well-known Crag 
species, in having all its ridges frondiculated, and I have named it after the discoverer, 
the Rev. H. Canham. 
Murex urtnaceus, Ziané. Supplement, Tab. II, fig. 11. 
MUvREX DECUSSATUS, Broc. Conch. Foss. Subapen., p. 391, pl. vii, fig. 11. 
Locality. Red Crag, Harwich ? Butley. Fluvio-marine Crag, Bramerton? Post 
Glacial, Kelsea Hall. 
At page 39, vol. i, of the ‘Crag Mollusca,’ is introduced a notice of this species as 
having been found in the Fluvio-marime Crag at Bramerton. ‘This was sent to Sir Charles 
Lyell for examination, in whose possession I saw it. We were both of opinion that it 
was a genuine Crag shell, but a short time previous to the publication of my first volume 
it was unfortunately lost, and I was unable to have it figured. I have, therefore, now, in 
order to complete the Crag Mollusca, given the representation of a recent specimen, and 
since the Plate has been engraved, Mr. A. Bell has found a fragment of this species im the 
Red Crag at Butley. 
In a paper by the late Mr. Webster, in the ‘Trans. of the Geol. Soc.,’. vol. 1, p. 220, 
1814, is a List of Shells from Harwich (which, I presume, were intended as Crag species), 
and in this is the name of Murex erinaceus; but where these specimens are I cannot 
ascertain. There are two or three in that List it would be desirable to examine (viz. 
Trochus alligatus, Venus gallina, and Pecten infirmatus), to learn what shells were in- 
tended to be determined by those names. 
Mr. Jeffreys identifies a fragment of Murex erinaceus from the Kelsea Hill Gravel. 
