20 Anniversary Address. 



finely wooded bank below overhanging the Whitadder. 

 Crossing Allanton Bridge, we walked up the banks of 

 the Blackadder, below Allanbank House. Here, on the 

 south side of the river, we have a good section of the 

 Tr.edian strata, including sandstones and fossiliferous shales. 

 The discovery of animal remains in this section is due to 

 Mr. Stevenson. They are, as determined by Mr. Robert 

 Etheridge, jun., of the Ordnance Survey : Gyracanthtis 

 formosus, Agassiz ; G. taberculatus, Ag. ; casts of palatal 

 teeth of Ctenoptychius pectinatus, Ag. ; spine of probably 

 Ctena.canthus (?) ; scale of Rhizodus ; and crushed cases of 

 Entomostraca. Mr. Witham long ago found plenty of 

 Conifers, &c., in these strata, in a sandstone quarry, in the 

 immediate vicinity, at Allanbank mill, now filled up. "This 

 bed," Mr. Stevenson writes, " is just a little below the dark 

 -shales in which the fish, &c, remains (above enumerated) 

 occur, and is the same sandstone as is quarried at Langton, 

 Puttenmill, Kimmerghame, Broomhouse, Eccles, Coldstream, 

 &c; Its geological position is at the bottom of the Lower Car- 

 boniferous series. I have found remains of Gyracanthus, 

 Entomostraca, &c, in it, associated with Lepidodendra, Stig- 

 maria', Catamites, &c., (but no Ferns ) at Langton, Puttenmill, 

 ' and Broomhouse." Mr. Stevenson goes on to state that " the 

 only place where the rare Crustacean (Erypterus Scoideri) 

 is found is Kimmerghame, or rather Mungo's Walls quarry. 

 Only four other cases of its being found were recorded before 

 the Kimmerghame one. These Berwickshire beds are, I 

 think, chiefly of Estuarian origin, and are similar in every 

 respect to strata which are well exposed in Balagan and 

 other glens between Campsie and Dumbarton." On the 

 north side we got a few good plants : Viola odorata, Ver- 

 onica Buxbaumii, Lysimachia nummularia, Adoxa mos- 

 chatellina, and Omithogalum umbellatum. Large patches 

 of Mentha sylvestris, in fine state, were inspected, and Mentha 

 viridis was also gathered farther down the river ; and M. 

 piperita grows in profusion on the banks of the Whitadder 



