732 



INDEX. 



enclosing in the lower part the Ashburton 

 bands, in the upper the Plymouth and Torbay 

 limestones, 662 ; third, an arenaceous group, 

 662 ; fourth, glossy slates, 662 ; fifth, crystal- 

 line slates, 662. 



Devonshire, conclusions drawn from the details 

 respecting the formations in the north and south 

 of, 662. 



comparison of the formations of 



North and South Devon, 663, 689. 



— culmiferous series of, described, 669. 



. description of 



the lower measures, 670. 

 . ■ of the 



upper measures, 677. 



. granite of Dartmoor described, 685. 



. two distinct regions of elevation 



in, 687. 

 rocks of, belong to three periods of 



formation, 687. 

 . , not to be considered older 



than tlie Silurian system, 689. 

 _ objections to assigning the lower 



groups of, to the old red system, answered, 699. 

 note respecting the omission in the 



printed memoir of their first classification of 



the older rocks of, 634 note. 

 Devonian System, reasons for altering the term, 



old red system, to the, 701. 

 Diamond breccia of Bangnapilly, description of 



the, 542. 

 Diamond mines, remarks on the, of Bangnapilly, 



541. 

 Diluvial action, notices of, in the south of Ireland, 



67. 

 Diluvium, notice of, in Suffolk, 365. 



• of Coalbrook Dale, remarks on, 460. 



■ separable into two 



divisions, 460. 



notice of 



shells discovered in, 462. 

 Dingle Bay, list of heights to the north and south 



of, 4. 

 Diss, observations on the strata penetrated in 



sinking a well at, 137. 

 . section of the strata, 138. 



Disturbance, account of lines of, in the Coal- 

 brook Dale coal-field, 452. 

 Dockar, Mr. of Findon, section of the ichthyolite 



beds near the farm of, 142. 

 Dodman Point to the St. Austell granite, section 



from, 666. 

 Dolgellau, remarks on fragments of wood from 



a bog near, containing particles of metallic 



copper, 214. 

 Doneen, notices of the metalliferous deposits of, 



25. 

 Donnington Wood, diagram of faults near, 456. 

 Dorsal vertebrae, comparison of, in the Plesio- 



saurus macrocephalus and P. Hawkinsii, 525. 

 Douglas, Mr., description by, of the effects of the 



earthquake in Chiloe, Feb. 1825, 602. 

 Dromagh, notices ofthecoal measuresof,51 etseq. 

 Dronningestolen, description of the cliff called, in 



the island of Moen, 255. 



woodcut of the cliff, 256. 



Drummond Island, Lake Huron, remarks on Or- 



thocerata from, 706, 708, 709. 

 Dunstan Point to Withy Hedge, notice of the 



section from, 657. 

 Dykes, description of parallel trap, in Mayo and 



Sligo, 162 et seq. 



E. 



Earthquake, notices of, in Chile, Nov. 1822, 263. 



respecting, in Cutch, 319. 



— . on the north coast of the 



St. Lawrence, 97, 98 note. 



in South America, details respect- 

 ing phacnomena attending the, 601. 



notices of distant di- 

 stricts contemporaneously affected by, 602, 

 606 and note. 



Juan Fernandez, 



Concepcion, and Chili in 1835, 602, 618. 



Talcahuano, Chi- 



loe andLemus, 1837, 604. 



Copiapo and Co- 



quirabo in 1822, 612. 

 unequal action of, at 



different points contemporaneously affected, 



602, 606 and note. 



