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 striae. Mr. Jeffreys sent me 

 for comparison a shell obtained by him in the Porcupine dredgings, and which he intended 

 to call turyidulus, which resembles our shell, but is much thinner and less strongly striated 

 than ours. I have named the present shell after Mr. Leckenby. 



Trophon Actoni, 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 Tr. Actoni, 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 

 Eluvio-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 Sarsii, Jeffreys. Supplement, Tab. I, fig, 9. 



Length, 1-fths inch. 



Localities. Red Crag, Waldringfield {Bell), and Butley. 



A specimen represented as above referred to was obtained by myself in 1 868, 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 Sarsii, 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 craticulatus, Fabricius. Supplement, Tab. Ill, fig. I, a, b. 



Locality. Upper Glacial, Bridlington. 



Mr. Leckenby has obligingly sent to me for description a fossil from Bridlington which 

 4 



