122 SUPPLEMENT TO THE CRAG MOLLUSCA. 
Lerpton nitipum, Zurton. Supplement, Tab. IX, figs. 7 a, 4, ¢. 
Locahties. Cor. Crag, Sutton. Fluvio-marine Crag, Bramerton. Chillesford bed; 
Aldeby and Beccles. 
The specimen figured in ‘ Crag Moll.,’ vol. 1, Tab. XI, fig. 7, under the above name, 
is, I now believe, the same as ZL. depressum, Nyst (fig. 6 of the same Tab.), which I 
think is distinct from xztédum. I have recently found in the Cor. Crag at Sutton the 
specimen represented as above, which I have no doubt is the shell called xitidum by 
Turton, and Mr. Canham showed me a similar one from the same locality. <A 
specimen was sent to me by Mr. Reeve from Bramerton, and Messrs. Crowfoot and 
Dawson have sent one from Aldeby and several from the Waterworks Well at 
Beccles, which may be referred to the same species. These latter are from the Chilles- 
ford bed. 
Lepron puLtorpnum, 8. Wood. Crag Moll., vol. ui, p. 115, Tab. XI, fig. 9. 
Localities. As in ‘ Crag Moll.’ 
This shell is given by Dr. Hornes (‘ Vienna Foss.,’ p. 249, and by M. Weinkauff, 
‘Conch. des Mitt.,? p. 178) as a synonym to Bornia corbutoides, but that shell has a 
smooth exterior, while the Crag shell is covered with a kind of wavy granular ornament. 
Mr. Jeffreys, in his list to Mr. Prestwich’s paper, ‘Geol. Journ.,’ vol. xxvii, p. 189, 
referred the Crag shell (de/totdeum) to Lrycina Geoffroyi, Payr. He has since, however, 
written me that he was in error in so doing, and that he now considers the shell to be 
identical with corbuloides ; he also sent me two specimens of that species for comparison. 
These proved to be entirely destitute of any external ornament, the presence of which is 
so marked a characteristic of the Crag deltoidewm. Under these circumstances I have 
retained my Crag shell as a distinct species. ‘The specimens from the Red Crag are 
slightly worn, but the ornament may be detected by means of a lens; these have a slight 
depression in the central part of each valve. 
Lasxa Ciar Kia, Clark. Supplement, Tab. IX, fig. 10. 
Lepron Crarxim, Clark. Ann. Nat. Hist., 2nd ser., 1852, p. 293, and vol. ix, p. 191. 
= — Forbes and Hanl. Brit. Moll., vol. vi, p. 255, pl. cxxxu, fig. 7. 
— — Jeffreys, Brit. Conch., vol. ii, p. 202, pl. xxxi, fig. 5. 
Locality. Cor. Crag, Sutton. 
Length, 7g of an inch ; height, ‘9 inch. 
