ON THE SHELL-BEAEINa DEPOSITS AT CLAVA, AND OTHER PLACES. 



Shell)/ Clay at Clava. 



505 



son's Lists and Remarks 



(a) From upper part of 

 main section 



(b) From various 

 parts of section 



Habitat 



LUSCA. 



One small valve and two or 



three larger fragments 



One 



One small valve and a few 

 larger fragments 



One entire and a few valves 

 A few imperfect valves . 



A small fragment . 



Fragments of valves 



■ One, young . 



I Many ; the prevailing shell 



I Two . . . . 

 A few .... 



A few .... 



A few .... 

 A few . . . . 



ACBA. 



Two plates 



i few plates and a small 

 cluster attached to a stone 



Two fragments . 



Valves, moderately 

 common 



Rare and small . 

 A few valves 

 Rare 



One fragment 



A fragment, small 



Two imperfect 



valves 

 A small fragment . 



A few fragments, 

 and one imperfect 



Very common 



Two . 

 Common 



Three small . 



One whole and one 

 imperfect 



Three . 



A few plates, and 



on stones 

 Rarer, mostly on 



stones 



Arctic and North British, low water to 45 



fathoms. 

 Northern and British seas, 7 to 25 fathoms. 



British seas, in comparatively shallow 



water. 

 Common, all European shores, tides to a 



few fathoms. 

 Arctic and northern seas, 10 to 80 fathoms. 



Arctic and northern seas, less common. 



Arctic and northern seas, 20 to 80 fathoms. 

 Norwegian and British, not very common, 



10 to 90 fathoms 

 All climates, common, high water to a few 



fathoms. 

 Northern and British seas, local, 6 to 100 



fathoms. 

 Northern and British seas, common, tides 



to 50 fathoms. 

 Arctic, no longer British. 



Arctic and British, common, tides to deep 



water. 

 Northern and N. British, 20 to 40 fathoms, 

 Common on sea-weeds just beyond low 



water. 

 All sea-shores, abundant, between tide 



marks. 

 Nearer high-water mark, common. 

 Arctic, rare in British seas, low water to 



60 fathoms. 

 Northern and N. British, low water to 60- 



100 fathoms. 

 Nortliern and N. British, low water to 60- 



100 fathoms. 

 Northern and N. British, low water to 60- 



100 fathoms. 

 British and Northern, common, near low 



water. 

 Arctic and N. British, local, low water to 



40 fathoms. 

 Arctic and British seas, 5 to 70 fathoms. 



Common on stony shores. 



Common on stony shores in deeper water. 



obertson from parcels of the clay sent them at the time (see Trans. Edin. Geol. Soc, 

 «ser notes that 'fragments large and small were plentiful during the recent workings • 

 tie above species are all common in the Glacial clays of the West of Scotland 



