24 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Trophon propinquus, Alder. Crag Moll., Appendix, p. 313, Tab. XXXI, fig. 3. 



Supplement, Tab. II, fig. 15, a, b; Supplement, Tab. II, fig. 15. 



Localities. Cor. Crag, near Orford. Red Crag, Sutton and Butley. Upper Glacial, 

 Bridlington. 



In the 'British Conchology,' vol. iv, pp. 333 — 341, are described four species under 

 the respective names of Fusus Islandicus, F. gracilis, F. propinquus, and F. buccinatus (or 

 Jeffrey sianus, Fisch.) ; not one of these is there admitted by the author to have been an 

 inhabitant of the Crag sea, either of the Coralline or of the Red, and he says (p. 336) " I 

 do not consider the Crag specimens which have been referred to this species {gracilis) by 

 Searles Wood, Woodward, and Nyst, identical with the above. These last agree with 

 the North American form, which is smaller and more tumid and has a short spire. If 

 such should prove to be distinct it might be called curtus." 1 



Having expressed my dissent to Mr. Jeffreys, he obligingly sent me some of his recent 

 specimens for examination, but this has not altered my previously formed opinion. I 

 still consider gracilis, propinquus, and buccinatus (or Jeffreysianus) as Crag species. The 

 shell called Islandicus has a mammillated apex, and is probably distinct. This latter I 

 have not yet seen from the Crag, either the Red or Coralline. 



Supplement, Tab. II, fig. 15, a, represents a specimen with a very straight canal, 

 obtained by Mr. A. Bell from the Red Crag, Butley, and this I consider merely as an 

 abnormal form of F. propinquus ; and fig. 15, b, is that of a distorted variety of the same 

 species found by myself in the Red Crag of Sutton. Pig. 21 of Supplement, Tab. VII, is 

 a reversed form obtained by Mr. Robert Bell at Waldringfield. 



Trophon Leckenbti, S. Wood. Supplement, Tab. VII, fig. 1. 



Locality. Upper Glacial, Bridlington. 



The specimen figured has been in my possession for several years, but is, unfor- 

 tunately, imperfect, and must, I think, have been given me by Mr. Leckenby, of 

 Scarborough, to whom we are much indebted for obtaining the authentic fauna of the 

 Bridlington bed. 2 



Though resembling gracilis, Islandicus, propinquus, and Jeffreysianus, it differs 



1 Fusus curtus, James Smith, a Clyde fossil (' Trans. Geol. Soc.,' 2nd ser., vol. vi, p. 156, No. 26), is 

 probably Mangelia Trevelyana, Forb. and Hani., and F. curtus of James Sowerby is a London Clay 

 shell from Highgate, M. C. T. 199, fig. 5, and is quite distinct. 



2 I am sorry to say that spurious shells have been put on the scientific market as from Bridlington. 

 Amongst them one that Mr. Leckenby detected, and sent me to look at, was an Eocene shell from a bed 

 whose fossils are of similar colour to those from Bridlington. 



