GASTEROPODA. 75 
NV. Aldert has been found at Yarn Hill by Mr. Crowfoot. I have seen a fine specimen 
found by Mr. Harmer at March, and it is given (under the name zitida) by My. Jeffreys 
from Kelsea Hill. Since my plate has been engraved I have found a specimen of this 
species in the Coralline Crag of Gedgrave. 
Natica cLAusa. Crag Moll., vol. i, p. 147, Tab. XVI, fig. 2. 
Locahties. Red Crag, Sutton and Butley. Fluvio-marine Crag, Bramerton. Chilles- 
ford bed, Aldeby, and Horsted. Juower Glacial, Rackheath. Middle Glacial, Hopton, 
and Billockby. Upper Glacial, Bridlington. Post Glacial, Kelsea Hill. 
Specimens of this species have been now obtained from all the above formations. It 
is not uncommon in the Middle Glacial, but the specimens are all young shells. It 
seems the reverse of common in all the formations prior to the Middle Glacial. It is 
given from Kelsea Hill by Mr. Jeffreys. 
Natica Grenianpica, Beck. Crag Moll., vol. i, p. 146, Tab. XII, fig. 5. 
Localities. Red Crag, Butley. Fluvio-marine Crag, Bramerton, and Thorpe in 
Suffolk. Chillesford bed, Chillesford. Upper Glacial, Bridlington. Post Glacial, 
Kelsea Hill. | 
Since the publication of the ‘Crag Moll., I have myself found this shell at Butley 
and Chillesford. It has been found by Mr. Reeve in the Fluvio-marine Crag, Bramerton, 
and is given by Mr. A. Bell from that of Thorpe in Suffolk. 
Mr. Jeffreys gives it from Kelsea Hill. It appears to me that the WV. Jorealis 
of Mr. A. Bell’s list in the ‘ Ann. and Mag. Nat. Hist.’ for May, 1871, is WV. Grenlandica, 
Beck. 
Narvica HEMIcLatsA, Sow. Crag Moll., vol. i, p. 144, Tab. XIV, fig. 5. 
Localities. Red Crag, Walton, Sutton, and Butley. Chillesford bed, Easton ? 
In my Monograph I gave this shell from Walton and Sutton, and I have since found 
it at Butley. Mr. A. Bell informed me that he had observed it at Easton Cliff, but he has 
not so given it in either of his lists in the ‘Ann. and Meg. of Nat. Hist.’ Dr. Woodward 
gives it in his list (in ‘ White’s Directory ’) as common at Norwich, but I have not met 
with an instance of its occurrence in that neighbourhood. 
