Xvi | CONTENTS. 
PaAGo 
however, always worth looking at when they occur. — Strik- 
ing Instance in the Line of the Great Caledonian Val- 
ley. — Indicative of the Direction in which the Volcanic 
Agencies have operated.— Sections of the Old Red Sand- 
stone furnished oy the granitic Eminences of the Line. — 
Illustration. — Lias of the Moray Frith. — Surmisings regard- 
ing its original Extent. — These lead to an exploratory Ram- 
ble. — Narrative. — Phenomena exhibited in the Course of 
half an Hour’s Walk. — The little Bay. — Its Strata and their 
Organisms, . ‘ ° ° 30a ‘ , ; 95-108 
CHAPTER VII. 
Further Discoveries of the Ichthyolite Beds. — Found in one 
Locality under a Bed of Peat. — Discovered in another be- 
neath an ancient Burying-ground.—JIn a third underlying 
the Lias Formation.—In a fourth overtopped by a still 
older Sandstone Deposit. — Difficulties in ascertaining the 
true Place of a newly-discovered Formation. — Caution 
against drawing too hasty Inferences from the mere Circum- 
stance of Neighborhood.—The Writer receives his first 
Assistance from without. — Geological Appendix of the Messrs. 
Anderson, of Inverness. — Further Assistance from the Re- 
searches of Agassiz. — Suggestion. — Dr. John Malcolmson. 
— His extensive Discoveries in Moray.—He submits to 
Agassiz a Drawing of the Pterichthys. — Place of the Ich- 
thyolites in the Scale at length determined. — Two distinct 
Platforms of Being in the Formation to which they be- 
long, . . : . . : . ; . . 109-124 
