12 H. H. Howorth—Traces of a Great Post-Glacial Flood. 
(op. cit. p. 62). Mr. Sainter says of the two Cardia, the Cardium 
rusticum is also essentially southern and Spanish, Bantry Bay being 
now its most northerly and authentic distribution. The Cardium 
aculeatum reaches its highest northern range in the south or west of 
England and Ireland. The Area lactea is also a southern shell, 
ranging northwards as far as Berwick Bay and Oban (Scientific 
Rambles about Maeclesfield, pp. 57 and 58). 
Not far from the deposits just described, but at a level 600 feet 
higher, Mr. Prestwich found fragments of shells. This spot is 
situated near the Buxton New Road, about a mile eastward of the 
first toll-bar out of Macclesfield, and, according to Mr. Darbishire, 
is from 1120 to 1160 feet above the sea-level. Here the latter 
gentleman found fragments of 12 species of shells, namely, Psammodia 
ferroensis, Tellina solidula, Mactra, Cytherea Chione (a characteristic 
hinge-fragment and another), Artemis lincta, Astarte arctica, Cardium 
echinatum, Cardium edule, Mytilus, Turritella communis, Fusus antiquus, 
and Trophon. After enumerating these shells, Mr. Darbishire adds 
the striking comment, “‘ The occurrence of the Cytherea in this bed 
at a height of 600 feet above the beds examined on the west of 
Macclesfield is very curious, and adds a formidable consideration to 
the many difficulties which seem as yet to delay the solution of the 
‘ Drift’ problem ” (id. pp. 64-0). 
If we turn from these high beds in Cheshire, to the famous beds 
at Moel Tryfaen, in Carnarvonshire, we shall find that, although the 
Lusitanian species which are found at Macclesfield are absent, 
the general facies of the deposit is the same. Of fifty species found 
there, as many as 87 are still found living in the Irish Sea, while 11 
only are typical of a more northern habitat. The evidence on the 
whole pointing no doubt to a colder sea, such as is known on the 
Scandinavian coasts and those of Boreal America, but in no way 
justifying the notion that it was like that of the Polar regions. 
The Irish drift-beds were treated in a compendious paper by 
Mr. Bell in the 10th volume of the Gxonocrcan Macazinu. The 
evidence they furnish is like that of the beds on the opposite side of 
St. George’s Channel. In the well-known Wexford beds 69 species 
of shells have occurred, of which as many as 52 still live in the 
British seas. Tien, that is, barely one-seventh, are northern forms, 
viz. Astarte borealis, Leda hyperborea, Leda oblonga, Nucula proxima, 
Natica affinis, Pleurotoma Vahlii? Scalaria Greenlandica, Trophon 
Fabricii, T. clathratus, Volumitra, sp. Greenlandica. These northern 
forms, however, are balanced by the occurrence with them of the 
southern forms Leda pusio? Fusus crispus ? Nassa_ semistriata, 
Turritella inerassata, one Japanese species, Nucula Cobboldia, and 
two others whose habitat is unknown, Melampus pyramidalis and 
Fusus Bailyi (op. cit. pp. 451 and 452). In the Dublin drifts 33 
species have occurred, of which 29 still live in our waters. Of the 
other four, two, namely, Loripes divaricatus and Woodia digitaria, 
are Lusitanian forms, and found on the East Atlantic coasts of Spain 
(Jeftreys’ British Conchology, vol. v. p. 179). 
On the banks of the Logan and the southern shores of Belfast 
