138 EEPOKT— 1888. 



Cj'praia europea. 

 Helcion pellucid um. 



,, var. Isevis. 

 Hydrobia ulvse. 

 Lacuna puteolus. 

 Littorina neritoides. 

 ,, obtusata. 

 „ littorea. 

 Murex erinaceus. 

 Nassa pygm<Ba. 



,, reticulata. 

 Purpura lapillus. 

 Patella vulgata. 

 Trochus cinerarius. 



,, zizyphinus. 



Trochvis umbilicatus. 

 Astarte sulcata. 

 Cardium edule. 

 Lutraria elliptica. 

 Leda pernula. 

 Lucina borealis. 

 Mactra elliptica. 

 Mytilus edulis. 

 Nucula nucleus. 

 Ostrea edulis. 

 Pecten opercularis. 



,, varius. 

 Tapes virginea. 

 Crab claw. 

 Balanus. 



Above this layer were embedded in the face of the cliff numerous land 

 shells, such as Helix hispida, Helix ericetorum, &c. These may be of 

 no great age. Traces of upland peat occur, and the freshwater Limnea 

 truncatnla is not uncommon, embedded in the cliff face. 



The marine shells are also present in the railway cutting, and frag- 

 ments may be noticed in the more finable clay or marl beds on either side 

 of Wexford Harbour from the water level to some distance up the sides 

 of the elevations already referred to. Near Wexford the clay becomes 

 more sandy and yellowish, due probably to an admixture of the sands of 

 the earlier series. Here traces of an old layer of oysters are visible. 

 Elsewhere, as in the cliffs south of Arklow, it puts on the look of a rain- 

 wash or brick earth, with few included rocks and without fossils. 



The sand at Ballygeary yielded a broken Trophon Barvicensis, and 

 the stiff black clay a fragment each of Astarte sulcata and Pectunculus 

 glycimeris. 



The only northern species obtained after close search were Leda pernula 

 and, doubtfully, Astarte borealis. 



Captain James described (1839) the cliffs at Ballygeary as consisting 

 of dark tenacious clays, with rows of Nullipores. The only trace of this 

 alga found was on a limestone pebble in the lowest clay, with a serpula 

 attached to it. 



(iii) The Coast from Delgany to Killiney. 



To ascertain what relations (if any) the Wexford series of deposits had 

 to the so-called Lower, Middle, and Upper drifts of the Dublin area, it 

 became necessary to examine the coast-line with some attention, from the 

 rise of the cliffs at Delgany past Greystones to the sides of Bray Head, 

 and thence to the granite boundary at Killiney and Dalkey, espe- 

 cially the fine exposure at Ballybrack in Killiney Bay, where, according to 

 Professor Hull, the three sections are to be seen, as well as elsewhere. 

 However it may be elsewhere, I was unable to detect any traces of an 

 Upper drift ; a conclusion I have since discovered was arrived at some 

 years ago by Mr. G. H. Kinaham,' who, in discussing the question, states 

 his opinion ' that there is no deposit between Killiney Hill and the Bray 

 river that could possibly be called an Upper boulder clay drift,' as given 

 by Professor Hull in the section in his paper upon Irish drifts.^ 



The older drift in Killiney Bay is made up of large and small rocks, 



' Geol Maff. vol. ix. p. 265 et seq. (' Middle Gravels of Ireland '). 

 - Ibid. vol. viii. p. 295. 



