738 



NDEX. 



Hopkins, W., Esq., quotation from, on the effects 



which would be produced, if the elevatory 



force had the character of an impulsive action, 



628- note. 

 Hornblende slate, account of, in Mayo and Sligo, 



161. 

 Hornstone, notices of, in south of Ireland, 7, 13. 

 Hose Hill, near Reading, notice of beds sunk 



through at, 129 and note. 

 Hot springs, description of, near Urjunah and 



Kair, 556. 



• notice of, in the Pindee Hills, 555. 



Humboldt, A. de, observation by, respecting the 



unequal action of earthquakes, 606. 

 — — ■ tables by, of volcanic phae- 



nomena, 610. 

 observation of, on the grouping 



of volcanic phaenomena in Quito, 614. 

 ■ observations on his views re- 



specting parallelism of, in double chains of 



mountains, 627 note. 

 Hunton, Louis, Esq., remarks on a section of the 



upper lias and marlstone of Yorkshire, showing 



tlie limited vertical range of the Ammonites, 



&c. 215. 

 Hutnoor, description of the country near, 552. 

 Hybodus keuperinus, notices respecting, 338. 

 Huronia, observations on the structure of, 708, 



711. 



I. 



Ichthyolites, observations on the position of, at 

 Gamrie, 139. 



■ notices of in the Coalbrook Dale 



field, 442. 



Ichthyosauri, on the dislocation of the tail at a 

 certain point, observable in the skeleton of 

 many, 511. 



on certain peculiarities in the cer- 

 vical vertebrae of, 187. 



description of the atlas and axis, 



187. 



' description of the subvertebral 



wedge bones of, 188. 

 of the cervical verte- 



Ichthyosauri, observations on the adaptation of 

 the structure of the neck to the habits of, 191. 



. modifications in the cervical re- 

 gion occur in animals of different species and 

 age, 193. 



Tgloolik, notice of Orthocerata from, 706. 



Igneous agents, evidences of the disturbing power 

 of, in Cutch, 307. 



rocks, remarks on, in the Coalbrook 



Dale coal-field, 451. 



minerals found in, 452. 



(see trap). 



Ilfracombe calcareous slates, range of the, de- 

 scribed, 642. 



continuation proba- 

 bly of the calcareous bands on the north-east 

 flanks of the Quantocks, 642. 



resemble some of the 



upper calcareous slates of Plymouth and Tor- 

 bay, 663. 

 remarks on tlie fossils 



obtained from, 696. 

 harbour, description of the cliffs of, 



India, on the fossils of the eastern portion of the 



great basaltic district of, 537. 

 Inet, near Broseley, coal-shaft section, 478. 

 Inferior oolite, composition of, on the coast of 



Yorkshire, 227. 



distribution of fossils in, 228. 



Injesu, remarks on the country near, 594. 

 Inkberrow, section of keuper marls and sandstones 



near, 333. 

 Inveragh mountains, list of the highest points, 4. 

 Ipswich, sections of wells near, and at, 380, 382. 

 Ireland, notices on the geology of the north coast 



of Mayo and Sligo, 149. 

 ■ description of the line of 



coast, 151. 

 notice of Mr. Griffith's geological map of, 



br«, 190. 



of a skeleton map of, by Mr. Weaver, 



3 note. 

 Ireland, Bermudas, account of the island of, 108. 

 Iron, manufacture of, in Cutch, 293. 

 notice of a vein of, at Sharkham Point, 660. 



