DEFRANCIA, PLEUROTOMA. 93 
Defrancia purpurea, Montagu. 
Murex purpureus, Montagu; Fusus purpureus, Fleming ; 
Mangelia purpurea, Forbes and Hanley. 
Habitat—On the outside edge of the Tan Spit, Cumbrae, 
in 10 to 20 fathoms sand and nullipore; by no means com- 
mon. Also off Otter, Loch Fyne, where a dead specimen, 
14% inches long, was obtained. Mr. Norman dredged a few 
specimens at Arran, between Clachland Point and Holy 
Island, and found a dwarf form in some numbers in a rock 
pool on the Allans Rocks, Millport Bay (probably the variety 
Philberti). 
British distribution.—On the south-western, western, and 
northern coasts of these islands; generally scarce. Except 
in the report of Messrs. Brady and Robertson’s dredging in 
1874 on the Northumberland coast, I have not noticed any 
locality for this shell on our eastern coast. 
Foreign localities—From Norway throughout western 
Europe, the Mediterranean, and Aigean. M‘Andrew records 
it from Mogador, Madeira, and Canaries. 
PLEUROTOMA, Lamarck. 
Pleurotoma striolata, Philippi. 
Pleurotoma striolatum, Philippi; Pleurotoma Smithii, Forbes; 
Fusus elegans, Brown ; Mangelia striolata, Forbes and 
Hanley. 
Habitat.—In 15 to 20 fathoms, gravel and stones, off Little 
Cumbrae and outside the Tan Spit ; also off Otter, Loch Fyne. 
Although by no means common in a live state, dead shells 
and fragments are generally distributed in the district. 
British distribution—Southern and western coasts of 
England and Wales, and all round Iveland. I have not 
noticed any north or east coast localities. 
Foreign localities—Norway and Sweden (Danielssen), 
western France (Cailliaud), Spain, Portugal, Madeira, and 
Canaries (M‘Andiew), Mediterranean (Philippi, Nares, and 
others). 
Pleurotoma costata, Donovan. 
Murex costatus, Donovan; Fusus costatus, Fleming; Pleuro- 
toma coarctata, Yorbes; Mangelia costata, Forbes and 
Hanley. 
Habitat.—With the preceding, but only dead shells 
obtained. Mr. Norman has taken it “occasionally in deep 
