NOTES AND QUERIES. 
173 
Shall the wit of man eA"er divine, or -will he ever approach to even a proximate 
calculation ? Indeed, no ! It is not by years, but by indefinite ages and eons, 
that the geologist alone can speak of the progress of life in time. 
Mountain Limestone, Balleykeyron. a, rolled boulder of Mountain Limestone, probably 
from some bed further north, b, drift Ijoulders and clay, c, quarried stone and shales. 
When I began this letter I had many a question to put, but tliese I 
must leave for the present. I have looked upon these now familiar rocks for 
the last time for many years to come, and I will keep my questions to ponder 
over in some new locality. Should these " notes" induce any wandering 
geologist in Ireland to spend a few hours or a few days in Athlone, I would 
advise him to go direct to the quarry at Coorsan Point, with hammer and bag, 
and should he use his eyes as wcU as I have used mine, he cannot fail to find 
good specimens of the following fossils. 
The fotlowing is a List of Fossils to be met with in Athlone, Those marked with 
asterisks are common : the others are more rare. ' 
Clisophyllum * 
Amplexus corrolloides. * 
Encrinites, of several species 
Hemitripa Hibernica 
Penestella * 
Terebratula saculus 
„ hastataf * 
Athyris Roysii * 
„ lamellosa * 
„ subtilita * 
„ plauosulcata 
Spirifera striatus * 
„ eliipticus [Coorsan and Kil * 
„ attenuatus Toom] 
„ cuspidatus * 
„ ovalis * 
„ duplicicosta 
bisulcatus * 
Rhynchonella pugnus « 
„ pleurodon 
„ flexistria 
„ accuminata 
Orthis resupinata 
„ Micheiini 
Productus plicatus ^ Coorsan 
„ Martinii / and 
„ semireticulatus C Kil 
„ punctatus ) Toom 
Lithodomus, two species 
Euomphalus pentangulatus 
„ Dionysii 
Waticopsis Philipsii 
Turritella 
Loxonena constricta 
Melania constricta (?) 
Goniatites truncatus 
t And what I am inclined to regard, after what has been said by Mr. Davidson as several 
varieties of hastata. 
