450 Geological Society, 



maculatis, subfalcatis : neuris interrupt^ nigris : stigmate nigro : pe- 

 dibus flaventibus, atro-variis. — Demerara. 



Observations connected with M. de Gimbernafs communication. 

 By John Murray, F.S.A. F.L.S. &c. kc. 



This paper relates to the extraordinary production discovered by 

 M. Gimbernat in the thermal waters in the island of Ischia; which, 

 when recently cut from the rock, resembled raw flesh ; it soon putri- 

 fied, evolving ammonia. Dr. Schoner, of Copenhagen, was of opinion 

 that it might be allied to Oscillatoria thermalis. 



A letter was read from the President, appointing R. Brown, Esq., 

 Vice-President, in place of the late venerable Dr. Goodenough Lord 

 Bishop of Carlisle. 



A letter from General Hardwicke was read, On the trees found at 

 great depths in peat bogs in the county of Armagh. 



Sir W. Betham states that these bogs are full of fine timber, chiefly 

 oak and fir. Some cones accompanied the letter, which were stated 

 by Mr. Lambert (from the chair) to be those of the Pinus sylvestris, 

 though the cones are smaller than usual, approaching to the size and 

 form of those of Piiius Pumilio. 



A letter from J. Creswell, Esq. F.L.S., stated that a fish weighing 

 one cwt. had been taken in the river E.xe, unknown to the oldest 

 fishermen. It is supposed to be the fish called Ombrina in the Me- 

 diterranean ; the Scicena cirrhosa Linn., Umbriua of Cuvier. 



GEOLOGICAL SOCIETY. 



Nov. 2. — The Society having this evening assembled for the ses- 

 sion of 1827-8 : — An extract was read, of a letter from Captain 

 P. P. King, Pv.N., to Dr. Fitton, P.G.S., dated at Rio de Janeiro, 

 10th June, 1827: — with some observations on the specimens sent 

 home by Capt. King ; by the President 



The expedition under Capt. King, for the purpose of surveying the 

 Straits of Magellan, left Monte ^'ideo on the 1 9th of November, 1826 ; 

 and after putting into Port St. Elena, about lat. 45° south, and remain- 

 ing for a day or two in the vicinity of Cape Fairweather, continued for 

 ninety days within the Strait ; during which time, its shores, to the 

 east of Cape Froward, were surveyed under the superintendence of 

 Capt. King himself ; while his consort, under Capt. Stokes, examined 

 the western entrance. The map and specimens sent to England, 

 contain the results of these operations ; and Capt. King intended to 

 sail within a short time after the date of his letter, for the purpose of 

 continuing the survey. 



The coast at Port St. Elena is described by Capt. King as consist- 

 ing of porphyritic claystone ; of which the hills, from 300 to 400 feet 

 high, are entirely composed. The specimens from thence consist 

 of claystone, compact felspar, and hyperstene rock ; and the beach 

 affords a conglomerate, consisting of rounded fragments of these 

 substances, cemented by carbonate of lime containing portions of 

 shells, and resembling the recent calcareous conglomerates which 

 abound on the shores of Asia Minor, Australia, and several other 

 parts of the world. 



Cape 



