26 SUPPLEMENT TO THE CRAG MOLLUSCA. 



he tells me has been determined by Mr. Jeffreys to belong to the above-named species ; 

 the label accompanying the specimen says, " once marked Gunneri by S. P. W/' In the 

 Appendix to the ' Crag Mollusca,' p. 313, Tab. XXXI, fig. 4, is described a shell from 

 the neighbourhood of Wexford which had been previously considered by E. Forbes 

 (' Mem. Geol. Surv.,' 1846, p. 425) as Trophon Fabricii, Moller, with the name of 

 craticulatus, Fab., given by Moller as a synonym. The shell I have here figured is 

 probably the same species, but it is different in some of its characters, and I have in 

 consequence had it represented as a variety. The exterior is ribbed and decussated by 

 two or more raised spiral ridges, but it has not the upper part of the volution projecting 

 and fimbriated. I believe in the assignment, and have adopted the above name as being 

 the older one, on the authority of Moller. This name must, therefore, be given to the 

 figure in the ' App. to Crag Moll.' Fusus craticulatus, Broc, is a very different shell. 



Trophon Bamffius, Donovan. Supplement, Tab. Ill, fig. 2. 



Mukex Bamffius, Bon. Brit. Shells, vol. v, p. 169, fig. 1. 



Localities. Post Glacial, March and Kelsea Hill. 



The figure of this shell was taken from a specimen from the Clyde beds, and was 

 introduced in order to show the difference from the next species (figs. 10 a and b), but 

 since the plate was engraved I have seen a suite of specimens from the post-glacial gravel of 

 March ; so that this species is an East Anglian fossil. The March specimens are rather 

 larger than any that I have seen from the Clyde beds, and approach slightly nearer to 

 scalar if or mis. A specimen of Bamffius was sent me for examination by Mr. G. Maw, from 

 the Severn Valley beds. I have not met with this species from the Crag or any East 

 Anglian glacial bed. It is given under the name clathratus by Mr. Jeffreys from Kelsea 

 Hill. 



Trophon scalariformis, Gould. Crag Moll, vol. i, p. 48, Tab. VI, fig. 7. Supple- 

 ment, Tab. Ill, fig. 10 a, b. 



Localities. Red Crag, Sutton, Bawdsey, Butley. Fluvio-marine Crag, Bramerton. 

 Middle Glacial, Billockby and Hopton. Upper Glacial, Bridlington. Post-glacial, 



Kelsea Hill. 



The figure is taken from a Bridlington shell belonging to Mr. Leckenby, which seems 

 to have been the authority for the occurrence of Bamffius at Bridlington. The shell, 

 however, seems to me not to belong to that species, but to be the young of the much 

 larger Crag shell, scalariformis (' Crag Moll.,' Tab. VI, fig. 7), which (identical in size 

 and in all other respects with the Crag shell) is common at Bridlington. 



