MODE XIV. SILICEOUS GLUTENITE. 227 



till a proper analysis be formed, it may as well 

 follow the universal bricia, to which it may be 

 regarded as a remarkable rival. Bricias, with red 

 jasper, also occur in France, Switzerland, and 

 other countries ; but the cement is friable, and 

 they seldom take a good polish. All these rocks 

 present both round and angular fragments, which 

 shows that the division into bricias and pudding- 

 stones cannot be accepted : a better division, when 

 properly ascertained, would be into original and 

 derivative glutenites. In a geological point of 

 view, the most remarkable pudding-stones, which 

 might more classically be called Kollanites, from 

 the Greek*, are those which border the chains of 

 primitive mountains, as already mentioned. The 

 English pudding-stone (for a particular account of 

 wjiich see the Anomalous Rocks) is unique ; and 

 beautiful specimens are highly valued in France, 

 and other countries. It is certainly an original 

 rock, arising from a peculiar crystallisation, being 

 composed of round and oval kernels of a red, yel- 

 low, brown, or grey tint, in a base consisting of 

 particles of the same, united by a siliceous cement. 

 A coarser kind also occurs, consisting of grey 

 pebbles in a far more abundant grey cement ; it 



cement ; the more proper, as it also impliei iron, 

 often the chief agent. 



