ON THE MANURE GRAVELS OF WEXFORD. 411 
A few of the species mentioned by Capt. James, such as Leda pusio, 
Nucula proxima, Nassa semistriata, and the Mitra, I have not seen. ‘The 
Leda oblongoides is merely the hinge fragment of a small Yoldia, pro- 
bably Y. hyperborea. The most interesting find is the crag shell, Nassa 
reticosa, confirming my suggestion that the Wexford gravels are an 
extension of the pliocene deposit at St. Erth, Cornwall. 
The combined lists give about ninety species as found in the gravels, 
twenty-nine no longer being represented in British waters, seventeen of 
them occurring in the Scandinavian Seas, seven Mediterranean, and five 
extinct. 
From Ballybrack I have to add to my previous list Murex erinaceus, 
a pecten new to the northern fauna, Pecten glaber, and portions of the 
common lobster (Homarus vulgaris). 
Ballybrack to Skerries. 
The lower boulder clay or limestone drift is essentially non-fossili- 
ferous, and thus differs materially from the more recent so-called lower 
boulder clays of North Wales, Cheshire, and Lancashire. Present in 
Ballybrack Bay, it has its strongest development, so far as regards the 
coastline, between Howth and the extreme point of Skerries, consider- 
able masses still existing in the outlying Lambay and Shennick Islands. 
The shelly gravels on Howth and the Wicklow mountains do not offer 
much for comment, all the species except two still inhabiting the adjacent 
seas. The mountain gravels yield few species, and these are all much 
broken. 
Astarte compressa. Ostrea edulis. 
x elliptica. Pecten. 
a“ sulcata. Pholas crispata. 
Cardium echinatum. Venus casina. 
* edule. »  Sstriatula. 
Cyprina islandica. (Artemis) lincta. 
Lutraria elliptica. Tellina? 
Mactra stultorum. ; Trophon muricatus. 
Mya truncata, Turritella terebra. 
The Howth shells vary a little in the greater number of gastropods, 
and are probably of more recent origin, co-equal to the marls in Rosslare 
Bay, Wexford, and the gravelly sands and marls on either side of Bray 
Head (vide Second Report). Combining the list of Dr. Scouler, Canon 
Grainger, and other workers, the Howth fauna comprises : 
Buccinum undatum. Cardium echinatum. 
Fusus antiquus. 3 edule. 
» gracilis. Cyprina islandica. 
(? islandicus). Leda pernula. 
Littorina littorea. Mactra elliptica. 
“ obtusata. Mya truncata. 
Patella vulgata. Ostrea edulis. 
Pleurotoma turricula. Pecten opercularis. 
Turritella terebra. oy | Vallis 
Astarte borealis. Pholas crispata. 
es sulcata. Tellina balthica. 
Balbriggan Bay. 
This locality offers some interesting sections; resting upon and in 
hollows of the bed rocks there occur fragmentary patches of clayey soil 
