86 Praeger — The Marine Shells 



Trochus millegranus, Pkilippi. 



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, Born. 



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 ; but 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 zlzyphinus, 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. Ziyonsii. " The pure white variety has been dredged of all sizes, but 

 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 " (Fuci) 

 cut for manure about some of the islands" — Thompson. Hyndman took it 

 living in from 20 to 90 fathoms off Lame, and Dickie in Strangford Lough. 

 var. elata. " Deep water on the coast of Antrim (J. Gr. 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. 

 lacuna crassior, Montagu. 



Frequent, ranging from low water mark to the deepest water at the 

 Maidens. Thompson and Dickie took it in Strangford Lough. 

 lacuna divaricata, Fabricius. 



A common species. "The var. L. vincta is not uncommon ; L. canalis is 



