248 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



The Gowkhouse and Pitcon Burns rise in Langdyke 

 moss, and, after uniting their waters, flow through 

 the romantic and flowery Pitcon Glen, joining the 

 Garnock at Kersland. The Swinlees Burn comes 

 down from the once fortified Caerwinning Hill, and 

 flows through the Swinlees Glen to the Pitcon 

 Burn. 



The Rye Water runs a rapid course from between 

 the west sides of Knock and Irish Law, and passes 

 through the deep and romantic Hindog Glen at 

 Cunningham -Baidland, where it has exposed many 

 fine geological sections. Thence it flows past 

 Drake mire, and joins the Garnock at a place on the 

 latter called "the Rack." The Routen Burn rises 

 between Black Law (1,525 feet) and Irish Law (1,581 

 feet), crosses the Dairy and Largs road, and joins 

 the Rye Water. From Green Hill (1,261 feet) and 

 Cock Law (1,216 feet) the Rye also receives the 

 North and South Burns. The former rises in the 

 Blae Loch, a small tarn which may be said to be 

 so situated on the very top of the hills as never to 

 be seen until one has actually arrived at it. 



The Potyan comes from the Baidland Hill (1,099 

 feet) and falls into the Garnock below Dairy. 



The Caaf Water rises in the dolerite hill of 

 Lairdside, little more than a mile from the sea- 

 coast at Fairlie ; and for the first three miles of its 

 course it flows over the calciferous sandstone rocks 

 which lie below the igneous rocky masses of the 

 Dairy and Kilbirnie hills. On the right side, for the 

 first mile, lies Kaim Hill (1,270 feet), remarkable for 

 its thick post of quartz-pebble sandstone conglomerate, 

 which comes out on the east and west sides, and is 

 capped with porphyrite. Near Birket-Steel the Caaf 

 receives the Drum Burn, which rises on the felstonc 

 Caldron Hill. On its right is Glenton Hill, and near 

 its junction Ladyside Hill. At Birkhead the Caaf 

 cuts through the porphyritic rocks, which hero 

 bound the beautiful Birkhead Glen, and enters on 



