240 Proceedings of the Royal Irish Acadetmj. 
No. Locality and Remarks. ''j^^t North.'' 
607 Quartzite masses of the Head separated from 
one another hy a system of jointing, . . 24 33 W. 
608 Highest boss of quartzite ; joint on south side 
of, 13 33 W. 
609 Do. ; glacial striae on highest point of boss 
nearest sea, showing finely-polished sur- 
faces, 21 33 W. 
610 Do. ; vertical jointing traversing the mass, . 13 3 W. 
611 On demesne road; outcrop of purple slate - 
rocks on road, 28° 27' E. 
612 On demesne road, above "Brandy Hole" 
tunnel ; great mass of white quartzite at 
point where the demesne-road turns S.W., 58 27 E. 
613 Do. ; fault bounding the quartzite alongside 
the road near N.E. end of rock, . . 54 27 E. N.W. 
Do. do. do. do., . . 59 27 E. 
Do. do. do. do., . . 52 27 E. 
614 Quartzite mass above "Brandy Hole" tun- 
nel, on road in demesne ; vertical jointing 
cutting the fault (613), and apparently cor- 
responding to hollow betweeen the quart- 
zite bosses at the Bray end of the Head, . 85 3 "W. 
615 Alongside the quartzite ; a band of purple 
slates, 40 7 E. N.W. at 75\ 
616 Same farther south, . . . . . 57 27 E. 
617 About 5 yards N. of this quartzite outcrop; 
band of well-marked slate-rock, . . 52 57 E. 
618 Do. ; cut — by jointing, showing itself in beds 
further to N.W., 59 33 W. 
619 Eoad in demesne ; slate -rock cropping out on 
road, 80 57 E. 
Hillside, near Railway. 
620 First outcrop of quartzite ; beds in contact 
with (taken on hill), . . . . 78 27 E. N. at 61° 30'. 
621 Do. do. do. do., . . 77 27 E. 
622 Do. ; nearer Bray, 77 27 E. 
623 On face of hill opposite the point (wrongly 
marked) "Brandy Hole" on Ordnance 
Survey; contortion of beds here, mammil- 
lated surfaces at certain points : higher up 
on hillside the beds appear in normal state. — 
624 About 95 feet above path on hillside ; beds 
within 10 yards of quartzite ridge, . . 63 67 E, N.W. 56°. 
625 Quite near summit of hill; beds of purple 
slate-rocks, 53 57 E. Nearly vertical 
