'jomlin: notes on marine mollusca of nor'jh wales. 27 



Tapes pullastra var. perforans Mtg. — Odd specimens alive 



at Llandudno, Barmouth, and Criccieth. 

 Tellina donacina L. — Occasional valves at Bull Bay and 



elsewhere in Anglesea (F.A.). 



Tellina fabula Gron. — This shell is often fine and plentiftil 

 at Aloergele and Pensarn, with large numbers of Ceratiiolen 

 legumoi L.,and a small var. oi Madra subtnincata L. 



Psammobia ferroensis Ch. is quite a characteristic shell of 

 the province, being recorded from Colwyn Bay, Barmouth, 

 Penmaenmawr, Portmadoc (Greene), and not uncommon 

 at Aberdovey. 



Scrobicularia alba Wood. — Very common at Bull Bay, 

 Tynygongl, etc. (F.A.), Rhyl, Abergele, and Towyn. 



Solan pel lucid us Penn. — Dredged all over their area by the 

 L.M.B.C., and found abundantly on the shore at Red- 

 wharf Bay and at Bull Bay (F.A.). 



Mya binghami Turt. — Bull Bay (F.A ), Criccieth. 



Chiton fascicularis L. — I have taken this at Llandudno. 



Helcion pellucidum var. jaevis Jeff, may be taken in its 

 well-known habitat at the base of Laiiiinaria stems where- 

 ever this plant is washed up. 



Tectura testudinalis Miill. has been taken alive near Col- 

 wyn Bay. A live specimen thence is in the collection of 

 the Grosvenor Museum, Chester. 



Tectura virginea Miill. — Llandudno. 



Trochus zizyphinus L. — 1 have collected magnificent speci- 

 mens of this shell at low-water of a spring tide off Rhos 

 Point between Llandulas and Old Colwyn. I'hey were 

 very large, beautifully coloured, and not at all uncommon, 

 very conspicuous objects on the rocks as they crawled over 

 them without concealment. One of the largest specimens 

 belonged to the very distinct var. Icevigata Jeff, marked by 

 its absolute smoothness and a broadening of the basal 



