204 
THE GEOLOGIST. 
deposits which envelope the foot of the hill, in all respects similar to 
the celts found at Meudon. 
The only hatchet which did not belong to the locality was a milky 
white polished one, similar to those found at Bregy. 
M. Robert continues : 
" To strengthen my opinion that the deposits which line the valleys 
traversed by water-courses, have been formed by those water-courses, 
and consequently have nothing to do with the diluvium; the boulders, 
rolled pebbles, the sand, and even the mud, have been derived from 
the lands washed by the rivers and their feeders. 
" I appHed myself some time ago, before I studied these Celtic 
remains from a geological point of view, to the collection of the rocks 
and fossils to be found in the fluviatile deposits of the Paris basin. 
Without enumerating all, I may mention having collected the 
following : — 
1. Representatives of almost all the rocks which enter into the 
composition of the Paris basin. 
2. Rocks of La haute Bourgoagne, principally a reddish quartz-like 
porphyry, which is rather common, and granite rocks. 
3. Nerinae, Terebratulae, Madrepores, &c., belonging to the secon- 
dary formations. 
It is as well to remark that these objects have always been picked 
up along the rivers in going towards their heads, but never above 
the supposed situs before having been carried by the water. We have, 
therefore, strong presumptive evidence that these same water-courses 
have transported all the materials which enter into the composition 
of the fluviatile deposits in which the Celtic remains have been 
embedded. 
Fossil Fuel at Chiriqui, in Veragua, in Gh'enada. 
During the summer of 1859, the United States government sent 
to Chiriqui, in the hope to discover a favourable line for a railway across 
the isthmus, an expedition to which Dr. Evans was attached as 
geologist. 
He discovered in the Eocene Tertiary formation of that country an 
extensive and thick deposit of Hgnite of excellent quahty, and ex» 
tremely bituminous. M. Jules Marcou has referred the fossils of this 
deposit to the genera Carclium, Ceritlieum, Area, Natica, Mytilus, and 
Nucula, which belong to the age of the " Calcaire grossiere" of Paris, 
The collective thickness of the beds of coal is nearly seventy-four 
feet, and six are so near each other as to form a mass thirty feet in 
thickness, capable of being worked by the same gallery. The localities 
were it is seen are Cultivation creek, Blanco river, Sheinshik creek. 
Pope's Island. There are numerous debris of plants in the clay. A 
microscopic examination of the coal shows that it is formed of cellu- 
lose plants, the structure of which may be seen both in the cinders 
and in thia slices of the coal. 
