140 KEPOET— 1888. 



Mya truncata. 

 Mytilus edulis. 

 Mactra elliptica. 

 Ostrea edulis. 

 Pecten tigrinus. 

 Pectunculus glycimeris. 

 Psammobia ferroensis. 

 Pholas dactylus. 

 Saxicava arctica. 



Scrobicularia piperita. 

 Tellina Balthica. 

 „ calcarea. 

 Tapes decussatus. 

 Venus gallina. 



„ verrucosa. 

 (Artemis) exoleta. 

 Balanus. 

 Fish vertebra. 



Found by Canon Grainger (G.), W. W. Walpole (Appendix, Dr. Gwyn 

 Jeffreys, ' Brit. Conch.' vol. v.) (W".), Professor Oldham (0.) : — 



Cypraia europea (G.). 

 Pleurotoma rufa (W.). 

 Troclius cinerarius (G.). 

 Loripes divaricatus (W.). 



Mya arenaria (G.) 

 Psammobia vespertina (W.). 

 Woodia digitaria (W.) 



A comparison of these lists with those given as from the Wexford 

 gravels efi'ectually disposes of the suggestion that the fauna of the two 

 deposits are identical. 



(iv) From Delgany to the Bray River. 



In this district the cliffs rise from the shore a little S. of Greystones, 

 and passing northwards thicken considerably, the deposits rising to more 

 than 300 feet up the sides of Bray Head. The lowest beds at Delgany 

 are limestone drift, containing the usual quartz, granite, and Cambrian 

 boulders, capped by another gravel largely made up of Cambrian slates, 

 micaceous schists, grits, quartz, and granitic rocks. Old Red sandstones, 

 chalk flints, with comparatively little limestone. Yellow clay or marl, 

 resembling a brick earth, occurs, at first sparingly, with seams of fine 

 pebbles, thickening out northwards and infilling the hollows in the under- 

 lying beds. North of Bray Head it appears in the cliffs, dying out near 

 the beach at the Shangauagh river, as already mentioned. South of 

 Greystones, at the top of the gravel, a few fragments of Mytilns modiolus, 

 with adherent epidermis and a portion of Tapes virginea, were the only 

 fossils obtained. 



Between Greystones and the Head the gravels overlie sands, to which 

 they are presently seen to lie unconformable, the sands and pebbly seams 

 beneath exposing strong current bedding, at an angle of about 20°, for a 

 short distance, when an irregular mass of limestone debris appears, resting 

 upon a thick bed of dark clay, with seams of sand and small gravel, exhi- 

 biting much contortion — even to the doubling of the seams upon them- 

 selves — the overlying debris pressing down into the hollows left by the 

 contortions. 



Evidences of water sorting are very prevalent all through the mass in 

 the seams of pebbly sand which are interspersed in the drifts. Small 

 fragments of shells are not uncommon in the gravel, especially in the 

 rise above the line of railway before it enters the tunnel (Astarte sulcata 

 and compressa, Cardium echinatum, Tellina and Cyprina), but are seldom 

 determinable. 



The like conditions are found north of Bray Head, where the gravel 

 and bedded seams are seen to pass down to the sandy marls before men- 

 tioned. The bivalves just referred to are present here also, with a few 

 pieces of Purpura and Tarritella. 



