36 Praeger — The Marine Shells 
Trochus millegranus, Philippi. 
Of not uncommon occurrence, living in depths varying from 10 fathoms in 
Belfast Lough to 100 fathoms at the Maiden Rocks ; Dickie includes it in his 
lists of Strangford Lough shells. Thompson says — “ It inhabits the deeper 
portions of Belfast and Strangford Loughs, chiefly from 10 to 23 fathoms, in 
sand ooze, &c. Bundoran, Mrs. Hancock. T. Clelandi, Wood, is considered 
another variety. It was sent to the Author from Strangford Lough by 
James Rose Clealand, Esq.” Dredged at Glenarm, Mr. S. A. Stewart. 
Trochus granulatus, Porn. 
This handsome shell, the largest British Trochus, is of extreme rarity in our 
province. “ Two broken specimens dredged up at separate times in Belfast 
Bay ; hut as there are only two other examples known of its being found so 
far from its usual southern habitat, these have been no doubt introduced 
accidentally Hyndman, 1857 Report. “ Fragments in 25 fathoms, 2 miles 
off Black Head ” — Ibid., 1858 Report. It has been dredged off the Mull of 
Galloway, and at Sanda Island, opposite the Antrim coast, so its occurence on 
our shores is not improbable. I find the following marginal note in Mr. Wm. 
Swanston’s copy of Thompson’s work, opposite the name (T. papillosus, 
Brown) of this species: “One living and one dead, S.E. of Maidens, 72 
fathoms, 11th Sept., 1882— W. S.” The specimens are in Mr. Swanston’s 
cabinet, and are fine and characteristic examples. 
Trochus zizyphinus, Linne. 
A pretty and well-known species, which is distributed throughout our 
waters, and has been taken alive at all depths. It flourishes most in from 
about 5 to 25 fathoms. 
var. X.yonsii. “ The pure white variety has been dredged of all sizes, hut 
very sparingly, in Belfast Lough by Mr. Hyndman and myself ; on one 
occasion we found numbers of this variety on the beach at Ardmillan 
(Strangford Lough), whence they were brought adherent to “wrack ” {Pud) 
cut for manure about some of the islands”— Thompson. Hyndman took it 
living in from 20 to 90 fathoms off Larne, and Dickie in Strangford Lough. 
var. data. “ Deep water on the coast of Antrim (J. G. J.) ” — Jeffreys. 
Phasianella pulla, Linne. 
“Littoral in some localities; dredged in from about 6 to 10 fathoms in 
Belfast Bay, common ’’—Thompson. Living, frequent, near low water 
mark— Hyndman ; it was dredged by him alive in as deep as 20 fathoms on 
the Cod Bank off Larne. In a dead state it is abundant in the shell sand of 
the Turbot Bank, and Dickie records it from Strangford Lough. 
Xiacuna crassior, Montagu. 
Frequent, ranging from low water mark to the deepest water at the 
Maidens. Thompson and Dickie took it in Strangford Lough. 
Saeima divaricata, Fabricius. 
A common speeies. “The var. L. vincta is not uncommon ; L. canalis is 
