NOTES ON THE MARINE MOLLUSCA OF PORT-STEWART. 15 



Kenmare till twenty years ago. Mr. Welch also sent some 

 which had been taken from within half-a-mile of Newry in 

 marsh drains. Such is the history of this shell up to date. 

 I ha-^e only to record my own capture of it on the sea-sands 

 of Port-Stewart.] 



Turritella terebra (L.) — Neither frequent nor large, and yet " In 

 Loch Foyle the dead shells of this species constitute a 

 large part of the great shell-banks for which the place has 

 long been noted " (Praeger). 



Scalaria communis, Link. — Two specimens of this handsome 

 shell recorded from Magilligan in the Belfast Museum. 

 Authentic records for the Clyde are somewhat scarce. 

 Brown doubts its presence here altogether. J. Smith 

 obtained it on the Ardeer beach. 

 *Ianthina rotundata, Leach. — "On the north coast of Antrim 

 and on the coast of Derry it is of frequent occurrence, and 

 is occasionally washed in in quantity. I am informed that 

 after October gales the strand at Bush-foot is sometimes 

 thickly strewn with it. Portrush, occasionally — Miss 

 Richardson " (Praeger). My fortune in regard to this 

 beautiful oceanic visitor was limited to a single perfect 

 specimen, which was picked up not far from the rocks near 

 Rock House. The mollusc, as is well known, is entirely a 

 pelagic species, buoyed up on the Atlantic billows by its 

 float, from the under surface of which hang its clusters of 

 egg capsules. The only recorded Scottish localities where 

 it has been cast on our shores are ]\Iachrihanish Bay 

 (Campbeltown Museum); Loch Ryan (on the authority 

 of the late James Smith, of Jordanhill) and Skye (in a 

 MS. of the late Professor Forbes). It is strange, how- 

 ever, that some stray specimen should not be sucked 

 round the Mull of Cantii'e, and landed somewhere on our 

 broad Ayrshire sandy beaches. 



*Natica catena (Da C). — " Thrown up alive and of large size on 

 Magilligan Strand" (Praeger). Good-sized examples were 

 common on the Port-Stewart sands. 



N. Alderi, Forb. — Frequently met with. 



Velutina Icevigata (Penn.). — Not uncommon, but frequently in- 

 jured by the heavy waves. "Thrown up by the tide at 

 Portrush and Magilligan " (Praeger). 



