Palaeontological Speculations —Gratacap. 301 
the developmental influences, themselves perhaps less active, 
and a resultant finally appears in which contemporaneous 
faunas are at quite different stages or levels of evolution. The 
irruption into a fauna of an earlier technical form, of a part of 
a really contemporaneous fauna which has put on a later bi- 
ological expression would produce phenomena not unlike that 
of Barrande’s prophetic colonies. And this was _ practically 
Barrande’s own conclusion, though the subversive effects of 
stratigraphical study practically nullified them. 
Finally can we hazard the conjecture that evolution may 
produce synchronous identical biological results ? 
NOTE ON A TERTIARY TERRANE NEW IN 
KANSAS GEOLOGY. 
By GrEorGE I. ADAMS, Washington, D. C. 
In the summer of 1895, while making a reconnaissance in 
southwestern Kansas, I observed at a locality on the Cimarron 
river in Seward county, certain beds which appeared to me to 
be of Tertiary age, but which are wholly unlike the marls and 
mortar beds of Kansas. In the summer of 1896, I revisited 
the locality and searched for further outcrops with the hope 
of determining the relation of the beds and obtaining fossils 
which would indicate their age. The place at which the best 
exposures may be seen is in Secs. 25 and 26, T. 345., R. 31 
W., on the south side of the Cimarron river near a ranch at 
that time occupied by Mr. Kneeland. The formation dips to 
the eastward, certain beds having a measured dip of Io de- 
grees. The structure, however, is not regular. The lowest 
beds consist of a fairly well cemented white sandstone in thick 
strata. This sandstone has been quarried to a limited extent 
for building purposes. A particular layer shows numerous 
tracks, apparently those of a large turtle. Above the sand- 
stone there is a stratum of limestone about eight feet thick. 
Higher in the series there are other beds of similar nature 
somewhat thinner bedded. One of these, a soft chalky lime- 
stone about ten feet in thickness, is also represented on the 
north side of the Cimarron, in a low hill at which place it has 
been sawed into building stone which is used by the ranchmen 
