382 REPORT—1896. 
Some of the species were particularly abundant—as, for example, 
Turritella, Cyprina, Astarte, Leda, &e. Many were in excellent preser- 
vation, but others were broken and fragmentary. Some of the smallest 
shells, Zedas and others, were entire. 
The lower part of the shelly clay near the level of the stream being 
concealed by a talus, the Committee resolved to cut a trench to show a 
vertical section of the deposits down to the level of the stream. The 
clay was found to rest upon a bed of compact coarse sand and gravel, 
cut open to a depth of 3 feet 10 inches, no shell fragments being visible. 
The boundary between the compact shelly clay above and the sand and 
gravel below was sharply defined, and to all appearance horizontal. Fine 
shelly mud immediately overlay the sand and gravel. Higher up, the 
clay contained abundance of shells and a very few small water-worn 
stones ; one stone, the largest found in the trench, appeared to be finely 
striated. 
Owing to the percolation of water from the stream, the cutting was 
not continued downward to the solid rock ; but the mica-schist is visible 
in the bed of the Burn a few yards further down or west of the main 
section. 
As will be seen from the section (fig. 2), the visible thickness of shelly 
clay, resting on coarse sand and gravel, is 275 feet ; and the thick- 
ness of boulder-clay to the top of the bank is 74 feet. 
This overlying boulder-clay is of a reddish-brown colour, charged 
abundantly with boulders, some of which are striated. These consist 
mainly of crystalline schists of local origin, with a marked absence of 
fragments of red sandstone. Though boulders of Arran granite were not 
observed in the boulder-clay of the main section, they occur in considerable 
numbers in the immediate neighbourhood, both on the surface and in the 
ground-moraine. 
The shelly clay is also visible at one or two points on the north bank 
of the Cleongart Burn, where it is in like manner overlaid by reddish- 
brown boulder-clay. It has not proved so fossiliferous there as in the 
section on the southern bank which has just been described, but a few 
shells have been found in it. 
With the view of proving the extension of the shelly clay along the 
stream course in an easterly direction, the Committee put down a series 
of shallow bores as represented in the accompanying ground-plan (fig. 3).! 
Blue clay, resembling the shelly clay, was recognised in the samples 
obtained from the three bores Nos. 1, 2, and 3, 22 yards, 44 yards, and 
66 yards respectively east of the main section. 
No shells or other organic remains, except one or two fresh-water 
Foraminifera, were found in the materials from these bores. 
A small exposure of a similar clay was visible still further east, or 
88 yards distant from the main section. This contained some small frag- 
ments of shells, and a few Ostracoda and Foraminifera. 
Seeing that the shelly clay had been found in each of these three glens 
at nearly the same elevation, the Committee next considered it of im- 
portance to test its extension southward from Cleongart, in the direction 
-of Drumore Glen. For this purpose a trench was first cut along the top 
-of the shelly clay in the main section at Cleongart, extending for about 
1 These shallow bores were about 10 feet above the level of the stream, and 
respectively 23, 21, and 34 feet back from it. 
