XCiv PROCEEDINGS—PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
wealth of the world, as well as greater safety to the life of the miner. 
The problems of water supply have been greatly simplified, as we now 
know what kind of strata are likely to contain water, and where these 
should occur in any given series of rocks. 
Apart from these utilitarian considerations, however, it is impossible 
to estimate how greatly our intellectual life has been enriched by our 
increased knowledge of the wonderful story of the past history of our 
globe. A generation ago, it seemed to many that the progress of 
geological science was striking at the very roots of the Christian faith; 
but, far from such being the case, I believe it has done more than 
almost anything else to widen our views of the wisdom and power of 
the Creator. 
i ith April, 1901. 
Henry Coates, F.R.S.E., President, in the Chair. 
The following communication from A. S. Reid, M.A., F.G.S. r 
Trinity College, Glenalmond, was read :— 
NOTE ON SOME CRUSTACEAN TRACKS FROM THE 
CAIRNIES QUARRY, GLENALMOND. 
The above quarry is situated on the right (south) bank of the- 
Almond, two-thirds of a mile due west from Trinity College. The 
quarry is that from which the building stone for the College was 
obtained in 1843, etc., and was recently opened again (1891) to 
provide stone for further building operations. The rock is the usual 
rose-grey micaceous sandstone of the district, with argillaceous 
partings, “clay-galls,” and slightly calcareous concretions, and affords 
excellent examples of ripple-mark and sun-cracks, with occasional 
remains of Psilophyton. Last month (March, 1901) a slab of sand¬ 
stone was brought to me from this locality, which, besides having casts 
of a net-work of sun-cracks, has at one end of it the casts of a set of 
crustacean tracks. These occur in two parallel sinuous lines, 
extending for a length of 7J- inches across one corner of the slab; 
the marks are regular and continuous, and when the lines curve they~ 
keep their parallelism. As the surface of the slab is less argillaceous 
than the surface of the specimen from Balruddery lent me by Mr. 
Henry Coates for comparison, the markings are not quite so distinct 
as in that specimen; but the distance between the two lines of tracks 
in each specimen is practically the same, namely, ’31 inch, and the 
average distance between the adjacent marks in the separate lines is 
again the same, namely, *17 inch, in each specimen. 
The Balruddery specimen was, I understand, associated with 
undoubted crustacean remains (Pterygotus a?iglicus\ so that the 
occurrence of crustacean tracks in the sandstone of the Cairnies 
Quarry leads one to hope that these rocks, hitherto considered barren 
of all organic remains save that of Psilophyton , may yet yield some, 
further organisms. 
