260 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 11, 



2. Notice accompanying a Specimen of a Calcareous Band in the 

 Plastic Clay from the Bed of the Thames. By George 

 Rennie, Esq., F.G.S., Treas. R.S. 



The accompanying concrete of shells, clay, &c. was taken from the 

 bed of the river Thames, in Limehouse Reach, about three and a 

 half miles below London Bridge, situate between the City Canal en- 

 trance on the east, and the Commercial Dock entrance on the west 

 side. The shoal from which the specimens are taken has been 

 hitherto a great detriment to steam-vessels navigating the above 

 Reach at low water, and measures are in progress to remove the 

 same by means of dredging-engines, which have been in operation 

 for seven or eight months ; great difficulty is found in breaking 

 through the strata or crust with the iron buckets attached to the 

 engines, which have been carried away on many occasions, although 

 steel-pointed. Gunpowder is occasionally resorted to to break up 

 the strata, after which it is easily removed. The specimen is about 

 the thickness usually found, resting on a bed of clay, and covered 

 by loose gravel, or Thames ballast, three or four feet deep, which 

 forms the bed of the river*. 



March 11, 1846. 



T. H. Braim, Esq., Principal of Sydney College, Australia, was 

 elected a Fellow of the Society. 



The following communications were read : — 



1. Geological Report on a portion of the Beloochistan Hills. 

 By Captain N. Vickary. 



[Communicated by Sir R. I. Murchison, G.C.S., F.G.S.] 



The hill country visited extends from Shahpoor on the western 

 side to Goojeroo on the east, a distance of about ninety miles, and 

 from the sandstone range, bordering the Desert, to the Murray Hills, 

 in a northerly direction about fifty miles. The strike, and the di- 

 rection of the ranges and of the valleys is nearly east and west, and 

 the mean dip of the beds southerly. 



There are seven parallel ranges of mountains gradually increasing 

 in height from the low sandstone range bordering the Desert to the 

 Murray Hills, the most northern point visited. The low sandstone 

 range bordering the Desert was scarcely touched upon, but from its 

 appearance 1 conclude that it does not differ in structure from the 

 second sandstone range ; it dies away towards the west, but appeared 

 to extend in an easterly direction as far as the eye could reach. 



* The rock in question is no doubt the representative of the Bognor rocks, and 

 the fossils contained in it are Cyrena depei^dita and C. cuneata, but chiefly the 

 former species. 



