of the Older Stratified Rocks of Devonshire m\d Cormmll. 245 



firmed or rejecteil," to use our own words, "by the examination 

 of the organic remains of" the several groups." 



And here we may briefly allude to visits made by one of 

 the authors to different parts of this region, both before and 

 after the Bristol Meeting of the British Association, and sub- 

 sequent to the reading of our second memoir in London. 

 During the autumn of 1836, he traced the calcareous system 

 of South Devon into Cornwall, and followed it continuously 

 through the north of the Lizard into Mount's Bay, and at Looe", 

 Fowey, and other places, found numerous organic remains 

 (not however yet described) : in a former year, 1828, he had 

 traced the fossil slates of Tintagel into Padstow Bay, but had 

 then no time to carry his observations further south. Before the 

 autumn of 1836, Mr.De la Bechehad worked out the structure 

 of the north side of Cornwall in great detail: and one of us, 

 informed by him of the existence of many other fossil localities, 

 examined the north Cornish coast; and concluded, in a paper 

 read at Cambridge in the winter of 1836-37, that the fossil- 

 iferoiis system Ofi both sides of Cornwall ims the same, and 

 therefore of the age, or nearly so, of the calcareous rocks of 

 South Devon. The same view was re-stated by us in the 

 paper read to the Geological Society. We still believe this 

 view to be correct, and hesitate not to class the calcareous 

 rocks of South Devon, and the fossiliferous slates of both 

 coasts of Cornwall, together. 



Last summer (1838), one of us paid a visit to Devon and 

 the neighbourhood ofLaunceston, for the purpose of ascertain- 

 ing the following points : 



1. Whether the limestones of Newton Bushell could be 

 classed with the carboniferous or mountain limestone, an opi- 

 nion advanced by our friend Mr. Austen *, who drew that 

 conclusion from the forms of the numerous fossils he had 

 brought to light. 2. Whether the true culm-measures pass 

 under the Ashburton or Chudleigh limestone. 3. To ascer- 

 tain (especially after Mr. Weaver's memoir) whether there was 

 any general discordancy of position between the culm-beariuCT 

 beds and the Cornish slates near Launceston. To each of 

 these questions his observations gave a negative. He was 

 confirmed in the views first stated by the authors in 1837, 

 concerning the relations of the limestone of Torbay to that of 

 Plymouth; and notwithstanding the many fossils of the New- 

 ton Bushell limestone resembling those of the (arboniterous 

 system, its beds formed clearly a part of the group subordi- 

 nate to the great southern slate deposit. He saw no «'Ood 

 reason for thinking that the culm-measures pass under any 

 • See Proceeding'! of Geological Society. 



