382 Scientific Intelligence. — Mineralogy. 



come from a place below Elgin, called Stotfield, where a similar 

 flint is found in situ, and the coast there is strewed with rolled 

 blocks of a similar kind. The flints at Peterhead may have 

 come from the same place." 



16. Blackpots Clay, near Banff- — At Blackpots, a short dis- 

 tance from Banff, and on the sea-shore, there is a considerable 

 bed of clay containing organic remains, resembling the organic 

 groups that characterize geologically the Lias. Mr Christie, 

 in a late communication to me on this subject, says, — " I men- 

 tioned to you, that I considered the bed to be of considerable 

 extent ; that I had traced it along the coast from the serpentine 

 rock at Portsoy, eastward to Troup, a distance of upwards of 

 20 miles ; and I considered it the same bed as is wrought into 

 brick, tile, he. at a place called Cairnhill, close by the church 

 of the parish of Marnoch, at least 15 miles south from Black- 

 pots. 1 have not found organic remains at any other point than 

 at Blackpots ; but as the clay is wrought at Cairnhill, I have 

 little doubt but I will find them there when I have an opportu- 

 nity of examining the spot.*" 



MINERALOGY. 



17- Prunnerite. — The violet-blue mineral found along with 

 apophyllite, in the island of Hestoe, one of the Faroes, and hi- 

 therto arranged as a variety of cuboidal calcareous spar, has 

 been, by Esmark, on account of its form and large proportion 

 of silica, put forth as a new species, which he names Prunnerite, 

 in honour of Prunner, the naturalist of Cagliari, in Sardinia. 



18. Pinguite. — This is a mineral resembling bole, found in 

 the mine of Neu Beschert Gliick, in the Saxon Erzgebirge. It 

 is not unlike green iron-earth. Its specific gravity = 2.315. 

 Massive. Hardness = 1. Occurs in veins of heavy spar. 



19. Motions in Water caused by the process of Respiration 

 in Animals *. — As the function of respiration in the Unio picto- 



• The motions in water caused by sea animals of various descriptions were 

 noticed at an early pe; iod by observers, but it is only of late years that they 

 have engaged the particular attention of zoologists. Carus, in his prize 

 essay, published a good many years ago, illustrates these motions by figures ; 

 and the same has been done by Dr Unger. 



