334 MOLLUSCA. 



sionally found adapted to the form of the shell to which it attaches itself. 

 Belfast and Strangford Loughs, Mr. Ilyndman ; Carlingford, W. T. 

 P. (/lahcr, Mont. 



Cork Harbour, rare, Mr. Humphreys ; Birterbuy Bay, Dr. Farran. 



I have not seen the specimens from either locality. 

 P. Icevis, Penn. 



Noticed as from " Dublin Bay, very rare," in Turton's Catalogue ; but 

 in his Conch. Diet. (p. 131 and 133), and Brit. Bival. (p. 213, 214), he 

 makes P. Icevis, Mont., the same as P. similis, Laskey. Mr. Barlee in- 

 cludes P. Icevis in his Birterbuy Bay list. 

 P. similis, Laskey. 



Numerous valves were dredged from 45 fathoms off Cape Clear by Mr. 

 M'Andrew, who finds it " an abundant deep-water species from Scilly to 

 Zetland." Entrance of Belfast Bay, 30—35 fathoms, Mr. Hyndman. This 

 species was noted, at the suggestion of Professor Edward Forbes, as pro- 

 bably sjTionjTnous with P. Icevis, in my Report on the Invertebrata of 

 Ireland. 



P. obsoletus, Penn. 



Taken not uncommonly, but in limited numbers, in the deeper parts of 

 Belfast and Strangford Loughs, on shelly and sandy ground. A specimen 

 dredged at Roundstone by Mr. Jeffreys, given me by|that gentleman. 



Mr. Humphreys mentions P. la;vis, Penn. Mont., as often found in the 

 intestines of haddock and gurnard taken in Cork Harbour ; he favoured 

 me with one of these specimens, which I regard as a smooth variety of 

 P. obsoletus. 



P. varius, Linn. 



Not very uncommonly found attached by a byssus to the shells of oysters, 

 brought from the North and East coasts, &c., to Belfast market. Dredged 

 in Killery, Clifden, and Clew Bays in July, 1840. Dr. Farran mentions his 

 finding P. varius and P. maximus at 20 fathoms in Roundstone Bay, and 

 in some situations with not more than a foot of water over them in Clif- 

 den Bay, and in some instances the P. varius was altogether drj', 1844. 

 Mr. Warren has a specimen 3^ inches long and the same broad, found at 

 Killibegs. 



P. striatus, Muller. 



A single specimen dredged in Strangford Lough in 1837 by Mr. Hynd- 

 man and myself. 



Procured on rocky ground. East of Cape Clear (40 to 45 fathoms), by 

 Mr. M'Andi'ew, who remarks that " it is a common though rather deep- 

 water species." I have obtained it at Scilly, Isle of Man, Mull of Galloway, 

 Glenluce Bay, Clyde, and Hebrides ; generally adheres to stones ; only at 

 Oban have I found it attached to the Fucus. 



I have learned from Mr. Barlee that he obtained this species in Birter- 

 buy Bay (County Galway), in the summer of 1845. 1847, I saw a spe- 

 cimen which was di'edged off the coast of Waterford, near the NjTnph 

 Bank, in Mr. Warren's collection. Nov., 1849, I saw one in Mr. War- 

 ren's collection, which he found among a mass of Caryophijlliu Smithii 

 brought him from the Nymph Bank above four years ago. * 



* Pecten Danicus, Cham. 



Pecte7i nebulosus. Brown's Illust. 

 In Dr. Farran's collection arc specimens of this Pecten, purchased of a dealer 



