SCALARIA. 215 



size is mentioned by Mr. Maclavirin in his Appendix to 

 Dr. Johnston's interesting account of the Mollusca of 

 Berwickshire. 



The animal, which we have examined in the Zetland 

 Seas, has long and jjointed tentacula with conspicuous 

 eyes immersed in bulgings or rather swellings at their 

 external bases. The mantle forms a distinct fold opposite 

 the lower angle of the mouth. The foot is rather narrow, 

 obtusely triangular, and, as in the other species of this 

 genus, is often carried considerably in advance of the head. 

 The body, head, and foot are white ; the tentacula are of 

 lilac purple, except their bases, which are white ; the oper- 

 culum is very dark brown, or nearly black. Mr. Alder 

 describes a Northumbrian example of this animal as being 

 flesh-coloured, spotted with opake white ; the tongue has 

 the denticles more slender and more curved than those of 

 S. Turtonis represented by Loven. 



This is a northern species, and when found southwards, 

 as off the south-east coast of Ireland, occurs only on the 

 boreal outliers. It was first observed on the Northumberland 

 coast, where, according to Mr. Alder, it is rather rare in 

 the deepest water of the coralline zone. Shields (G. B. 

 Sowerby) ; Scarborough (Bean) ; Berwick (Johnston) ; 

 in twenty-five fathoms off the Coquet ; in fifteen fathoms, 

 Eda Sound, in forty fathoms, shelly bottom on the east 

 coast, and fine specimens in from eighty to one hundred 

 fathoms, on an oozy bottom, west coast of Orkney 

 (Thomas) ; in eighty and eighty-two fathoms, sand, alive, 

 and in ninety and one hundred fathoms, dead, Zetland 

 (M'Andrew and E. F.) Magilligan on the north coast of 

 Ireland, and in the south at Cork (found by Mr. J. D. 

 Humphreys), (Thompson), Off Mizen Head in fifty-six 

 fathoms, dead ; on the Nymph Bank, alive in fifty and 



