76 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Natica cirriformis, Sow. Crag Moll., vol. i, p. 145, Tab. XVI, fig. 7. 



I only know this shell as a Cor. Crag species. It is given, however, by Mr. Bell 

 ('Ann. and Mag. Nat. Hist.,' September, 1870) from the Red Crag of Sutton, and of 

 Waldringfield, but I have not seen the specimens. 



Natica multipunctata, 8. Wood. Crag Moll., vol. i, p. 148, Tab. XVI, fig. 9. 



This shell Mr. Bell informed me he had obtained from the Chillesford bed of Easton 

 Cliff, but I have not seen the specimen, nor does he give it in either of his lists in the 

 ' Ann. and Mag. of Nat. Hist. ;' personally I only know the species from the Red Crag 

 of Walton, Sutton, and Butley, and from the Cor. Crag. 



Natica occlusa, S. Wood. Crag Moll., vol. i, p. 146, Tab. XII, fig. 4, Supplement, 



Tab. IV, fig. 11. 



Localities. Red Crag, Butley. Chillesford bed, Easton Bavent? Upper Glacial, 

 Bridlington. 



This species was proposed by me for the Bridlington shell, figured in ' Crag Moll.' 

 Since then I have obtained the specimen represented in fig. 11 of ' Supplement,' Tab. 

 IV, from the Red Crag at Butley, which appears to resemble N. occlusa from Bridlington 

 very closely, though the spire is not quite so much elevated, but more so than that in N. 

 clausa. I have therefore referred it to the Bridlington species ; Mr. Bell gives it from 

 Easton Bavent, but I have not seen the specimen. 



Natica catena, Da Costa. Crag Moll., vol. i, p. 142, Tab. XVI, fig. 8. 



Localities. Red Crag, Sutton and Butley. Fluvio-marine Crag, Bramerton. Chilles- 

 ford bed, Horstead and Coltishall. Lower Glacial Sand, Belaugh. Middle Glacial, 

 Billockby and Hopton. Upper Glacial, Bridlington. 



In none of the fossil specimens of this shell that I have seen are there any remains 

 of the marks resembling those upon the recent shell. In ' Brit. Conch.,' vol. iv, p. 22'2> 

 is the following observation, " The coloured markings of this species {catena) are not 

 exhibited in the Crag shells so named by Mr. Wood, although they are retained in his 

 N. millepunclata " — a remark that seems to imply a doubt as to the correctness of my 

 reference of catena. The cause of this difference I imagine is that the red spots of the 

 one are more durable than the broivn chain-like markings of the other, as in the dead or 

 beach laid specimens they are generally invisible. Bed spots appear to be permanent 



