94 PROCEEDINGS OF THE 



some way to the extiriDation of other animals in their feeding 

 ground and immediate neighbourhood. 



III. — On the Carhoniferovs Fossils collected on the Dvnbar Coasts hy 

 Mr Robertson and the Secretary. By Mr John Young. 



Mr Young ilhistrated his remarks by many sjiecimens of great 

 interest, conspicuous among which were several slabs covered by 

 the remains of a Cidaris — the Archoeocidaris Urei, one of the oldest 

 forms of sea urchin known to geologists. This organism, with its 

 plates and spines (the latter often nearly six inches in length), are 

 among the most valuable of the Dunbar fossils, and are there 

 found in a greater state of preservation than has yet been observed 

 in any other locality in Scotland. Several specimens of sandstone 

 were exhibited, containing curious tracks, of various designs, so to 

 speak, made by some animals; and several speculations were 

 offered as to whether these were the marks of annelids, crustaceans, 

 or molluscs. Mr Young concluded his paper by stating that, 

 from the variety of geological phenomena to be met Avith on 

 the Dunbar coast, and from the abundance of organic remains 

 in the strata, it was well worthy of a visit from the student of 

 geological science. 



