60 



II. Buccinum. 



In looking over Mr. Gray's excellent paper on 

 Testaceous mollusca, in the Transactions of the Royal 

 Society for the year 1834, I observe that he attributes 

 the differences between the forms a. and /3. of Bucci- 

 num undatum, to the circumstance of the former 

 (Buccinum undatum,) living in rough water, whilst 

 the latter (Buccinum striatum of Pennant,) inhabits 

 the smooth water of harbours. But such is not the 

 case on the Manx coast, where the form " striatum" 

 inhabits in abundance the most stormy part of the 

 neighbouring sea — the strait between the Isle of Man 

 and the Mull of Galloway. In the Frith of Forth, 

 comparatively sheltered, the Buccinum undatum is 

 almost always of the variety a. There is a third form 

 of the Buccinum undatum, which is not rare on many 

 parts of the Scottish coast, and which I have also 

 observed near Bergen, in Norway. It is a dwarf, 

 generally thin, but ribbed like the form a, and always 

 having the aperture deeply tinged with purple. It 

 inhabits pools, &C.5 near low water mark, and is fre- 

 quent in the Frith of Forth. It might be appropri- 

 ately distinguished as Buccinum undatum 7. littorale. 



III. Fusus. 



I have in my collection a worn specimen of a 

 Fusus, apparently undescribed, which was cast on 

 shore on the north coast of the Isle of Man. It has 

 the spire produced, with five whorls, slightly rounded 

 and crossed by strong longitudinal ribs, the interstices 



