188 The American Geologist. March, i89# 
Cragin. It is not only much larger, but also apparently a 
coarser-featured shell than the latter. 
A specimen <>f "Trigonia emory?' from "Denison, Texas," is 
apparently a young example of T. clamgera Cragin. The 
"Ait'copagia texana" is unquestionably a Gyprimeria. (See 
Contribution to Inv. Pal., etc., p. 177. For relation of C. tex- 
ana to G.crassa., see also p. 176.) 
Illinois. 
A part of one case in the large paleontological collection 
from this state, exhibited in the Illinois building, was devoted 
to the little corner of Cretaceous that intrudes itself within 
the otherwise severely Paleozoic borders of the state at its 
southern extremity. 
A fine small-medium-sized specimen of Exogyra c<>si<tt<< 
Say was labeled, "Cairo, Alexander Co. In a rock under the 
Ohio river. Struck in sinking a caisson for the I. C. H. H. 
bridge. Coll., S. W. Barton." 
A tray of casts of undetermined fossils, in grayish brown 
( ? Dakota or equivalent) sandstone, included several species 
of univalve and bivalve mollusks and a (V willow) leaf- 
impression, labeled, "Caledonia, Pulaski Co." 
Canada. 
In connection with the Canadian Mining Exhibit, the Geo- 
logical Survey of Canada found room for a paleontological 
collection, small, but representative of the leading geological 
divisions of the Mesozoic, including Triassic, Jurassic and 
Cretaceous, with divisions of the latter, and the Cenozoic of 
British America. 
Time and opportunity were not sufficient to give this col- 
lection the attention it deserved, or indeed to note any of its 
features of special interest. 
Mexico. 
In the excellent exhibit of mining and mineral resources of 
Mexico, displayed in the Mining building, was a small but 
interesting collection of fossils, a manuscript catalogue of 
which was kindly shown me by the courteous commissioner in 
charge, Prof. ( !arlos Sellerier. The catalogue enumerated about 
128 species. Of this number, seventy-nine were listed as 
