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Westbury; whereas at Aust some hundreds of forms, palates of tliis 

 singular genus have been found, always occurring in the Bone 

 bed. What peculiar barrier under any condition, whether 

 geographical or otherwise, could have existed at so short a 

 distance, to so completely prevent the migratory habit of a 

 genus of fishes, is a singular and remarkable problem. 



I append a vertical section of the Aust beds, where you 

 will, by comparison with my section in the Club transactions, 

 see at once the main differences, which are clearly defined in 

 the descriptive section at page 16. 



The Third Field Meeting was fixed for Bradford Abbas, at the 

 special invitation of our friend and colleague, Professor Buckman, 

 to whose hospitable summons a more numerous attendance of 

 his old associates might well have been looked for. 



The following account of the day's proceedings is drawn up 

 from notes kindly furnished by Professor Buckman. 



Having been put down at the Sparkford Station, our small 

 party was guided to a point about a quarter of a mile to the 

 west of the station, where both sides of the cutting on the 

 Great Western Railway, afford magnificent sections of the Lower 

 Lias Limestones, resting upon the Rhsetic beds. 



Mr. Charles Moore produced a carefully measured diagram 

 of these beds, which it is hoped will furnish subject matter for 

 a paper from his pen at a future time. 



From Sparkford our course was shaped in a southern direction 

 for Bradford Abbas, passing through Marston Magna and Mud- 

 ford, the latter significant of "wet clays," which cling to the 

 feet like some of the stiffest parts of the vale of Gloucester, with 

 the Lower Lias Clays of which, this part of Somerset is perfectly 

 identical. 



Passing from Compten to Bradford Abbas, (which we may do 

 by way of the celebrated "Half-way House,") we surmount 

 nearly two hundred feet, consisting of alternations of Sihceous 

 Limestones and Sands, the former sometimes nodular, sometimes 



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