84 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
* Velutina leevigata, Pennant. 
Helix levigatum, Pennant ; Helix levigata, Linné (probably); 
Bulla velutina, Miiller ; Helix haliotoides, Otho Fabricius ; 
Velutina striata, Macgillivray. 
Habitat—On stony and gravelly ground, in 6 to 30 
fathoms; rather common, and especially so off Bogany and 
Toward Points. I have taken it off Ardmaleish, Bogany, 
Ascog, and Garroch Head, in Bute; off Fintry Bay and on 
the Tan Spit, Cumbrae ; off Moll Dhu and Silvercraigs, Loch 
Fyne. Mr. Norman has taken it sparingly in Lamlash Bay, 
Arran; and Mr. Hennedy, at Gourock. 
British distribution.—Everywhere on stony and gravelly 
ground throughout our coasts ; a somewhat common species. 
Foreign localities—From Spitzbergen (Haton), Iceland 
(Verkriizen), and Scandinavia (Lovén, and others), through- 
out western Kurope as far as northern Spain (f‘Andrew) ; 
in the Mediterranean at Spezzia (Jeffreys). In America it 
extends from Greenland (Fabricius, and others) to Massa- 
chusetts (Gould) ; and Carpenter includes the North Pacific 
in its range. 
FAMILY CANCELLARUDZ, Forbes and Hanley. 
TrRICHOTROPIS, Broderip and Sowerby. 
* Trichotropis borealis, Broderip and Sowerby. 
Murex carinatus, Laskey; Fusus umbilicatus, J. Smith; Fusus 
Laskeyi, Macgilliwray. 
Habitat—On hard ground from 6 fathoms downward, in 
company with the preceding species; rather common on 
suitable ground throughout the district. On Bogany Point 
it is perhaps more at home than elsewhere, but my finest 
specimens are from the rough bank outside the Tan Spit; 
they measure 0.70 by 07.45. 
British distribution—From the North Channel to Shet- 
land on the western coast, and from the Dogger Bank 
northward on the east. 
Foreign localities—Norway (Lovén, and others), Iceland 
(Verkriizen, and others), Greenland (Moéller), St. Lawrence 
(Dawson, and others), Massachusetts (Gould). It probably 
inhabits the Arctic Ocean generally, and may be called a 
“ palzeocrystic” species, having been obtained by Captain 
Feilden at Dumb Bell Harbour (82° 30’ N. lat.), within a few 
miles of the farthest point hitherto reached by man. 
