MARSHALL: ON THE BRITLSH SPECIES OF BUCCINUM, FUSUS, ETC. 39 



to the " three living specimens " of T. iio(f/feni>< found off Guernsey in 

 1832. 



Fusus ANTiQUUS L. — A " young and dead specimen " has been 

 dredged by the Rev. J. Smart at Scilly ; this is its furthest southern 

 limit. The operculum is triangularly oval, dark horn-colour, very 

 coarsely wrinkled, with a few faintly-impressed lines, and often a 

 flexuous depression down the centre. Very rarely the shell is snow 

 white ; I have two from deep water off the Shetlands, but these do not 

 belong to the next variety. 



Van alba, Jeffr. — Off Cork (Wotton) ! off Aberdeen (Simpson) ! 

 the Irish Sea, and off Peterhead in 60 fathoms. All the specimens I 

 have seen of this variety are very finely striated, and one from Peter- 

 head is entirely devoid of sculpture except the lines of growth. It 

 attains 6|-in by 3-in., but one form of it from the Irish Sea, with the 

 aperture expanded and reflected, is 6i-in. by 4-in. Some aged 

 specimens of the latter have the outer lip formed of half-a-dozen 

 separate layers added one over the other, making the edge a third of 

 an inch in thickness. 



Var. cenfricom, Jeffr. — Great Fisher Bank, off Aberdeenshire 

 (Simpson) ! Doggerbank, 30 f This varies in the length of the spire, 

 but the last whorl is always tumid and greatly expanded, trumpet-shape, 

 like Limnaea auriruJaria. Some of my specimens have hardly any 

 spire, and the largest, from the Doggerbank, are 7-in. by 45-in. It is 

 yellowish-white externally, with the inside of a rich deep orange colour, 

 and occasionally the upper whorls are carinated as in the var. rarinata. 

 One monstrous specimen from Aberdeenshire has all the whorls 

 strongly carinated. 



Var. (jracilis, Jeffr. — I know this from S. W. Ireland only. It is 

 a very handsome shell, characterised by a long slender spire, a thin 

 texture, and tumid whorls. Its dimensions aie 6-in. by 2i-in. 



Var. carinata, Turt. = var. striata, Jeffr. — Bantry Bay, Irish Sea, 

 and Bristol Channel. My finest are from S. ^^^ Ireland, and measure 

 6^-in by 3-in. Some specimens approximate to F. despedus, L., in 

 sculpture, but the two forms can always be leadily separated. Gwyn 

 Jeffreys admits that this is F. carinatui, Turt., but gives no reason for 

 substituting a varietal name of his own, which was clearly not required. 

 Var. carinata is also a more suitable name, as all the forms of F. 

 aniviuus are striated. 



F. DESPECTUS, L., although a northern species, has been dredged 

 by the "Porcupine " in the Atlantic off Ireland, and by the "Challenger "' 

 as far south as Portugal in 470 f. (a young specimen). I have examples 

 from shallow water in the Faroe Isles, where it seems, however, to be 



