GASTEROPODA. 25 
from them all in two respects—one in that it is much less tapering, and the other in the 
shallowness of the suture. It is strongly marked with spiral striz. Mr. Jeffreys sent me 
for comparison a shell obtained by him in the Porcupine dredgings, and which he intended 
to call turgidulus, which resembles our shell, but is much thinner and less strongly striated 
than ours. I have named the present shell after Mr. Leckenby. 
Troruon Actont, S. Wood. Supplement, Tab. II, fig. 13. 
Locality. Red Crag, Butley. 
In this figure I have represented a specimen found by myself at Butley, which I am 
unable to refer to any known species. Its principal distinction is a slight shoulder to the 
volution or obtuse angularity at the upper part. ‘The outer lip is a little sinuated, like 
many northern species of this genus. 
If this should prove (by the discovery of better specimens) a new species, I propose 
to call it Zr. Acton’, in commemoration of the late Edward Acton, surgeon, of 
Grundisburgh, a zealous collector of Crag fossils, and a liberal distributor of his specimens 
where he thought they would contribute to disseminate information. 
A specimen very recently sent to me for examination by Mr. James Reeve, from the 
Fluvio-marine Crag of Bramerton, seems to belong to the same species, but the specimen, 
like my own, is imperfect, and unfit for correct determination. 
TropHon Sarstt, Jeffreys. Supplement, Tab. I, fig, 9. 
Length, \3ths inch. . 
Localities. Red Crag, Waldringfield (Bel/), and Butley. 
A specimen represented as above referred to was obtained by myself in 1868, from 
Butley, and since the figure was engraved Mr. A. Bell has shown me a similar specimen 
from the nodule pit at Waldringfield. 
In the paper called ‘ Nature,’ December 9th, 1869, Mr. Jeffreys has, in his report 
on the deep-sea dredgings, given to a shell there obtained, which he says is the same as 
my Crag fossil, the name of Fusus Sarsid, in compliment to the late Prof. Sars, who had 
obtained the same shell living near the Laffoden Isles; I have, therefore, adopted the 
name for my Crag shell. 
TRoPHON cRraticuLatus, Fabricius. Supplement, Tab. II, fig. 1, a, 4. 
Locality. Upper Glacial, Bridlington. 
Mr. Leckenby has obligingly sent to me for description a fossil from Bridlington which 
4, 
