370 Proceedings of the British Association for 1850 



The Professor then alluded to the relative position of the 

 lower beds, which he conceived are much better developed on 

 the south portion of the range than on the north, and con- 

 cluded by observing, that we must refer to the palaeozoic 

 rocks of America, before we can obtain a correct idea as to 

 the position of these beds as they occur in the south of Scot- 

 land. 



Professor Nicol mentioned his having met Graptolites in 

 Peeblesshire, and Mr Harkness, his discovery of them abun- 

 dantly near to Moffat, in Dumfriesshire. 



The President then explained the progress made in M. 

 Barrande's great and beautiful work on the Silurian or Tran- 

 sition Rocks of Bohemia. 



Professor Edward Forbes read Notices of some remark- 

 able forms of Fossil Radiata. 



Lieutenant Strachey, Bengal Engineers, noticed some 

 Recent Researches in the Himalaya. 



Lieutenant-Colonel Portlock described the intrusion of 

 the Trap Rocks into the conglomerate on the shore between 

 Tantallon and North Berwick. 



Mr Nasmyth. — On the Structure of the Lunar Surface, 

 and its relation to that of the Earth. 



Dr Man tell. — Notice of a Specimen of an Upper Jaw of 

 the Iguanodon. 



Mr William Stevenson. — On a Quartz Formation in the 

 South of Scotland. 



Notices of Earthquakes in South America in the years 

 1844-5-6-7. By Mathie Hamilton, M.D., formerly Surgeon 

 of the Potosi Mining Company. 



Section D. — Natural History, including Physiology, 

 Zoology, and Animal Physiology. 



Dr Mantell. — On the Dental Organs of Iguanodon. 



W. Thomson, Esq., of King's College, London. — On the 

 Lingual Teeth of the British Pulmono-branchiate Mollusca. 

 Communicated by Professor Edward Forbes. 



Mr James Hardy. — On an Acaris and Vibrio, that attack 

 grasses. Communicated by Dr Douglas Maclagan. 



