STATE GEOLOGIST. 11 



and middle Devonian, and generally do not mark any narrow geol- 

 ogical horizon. 



From their association, and the fact that they are all minute 

 specimens, I should conclude that it was a sparse fauna in unfavor- 

 able conditions of life, which might have lived anywhere along the 

 Upper Silurian or lower Devonian. But the Prodactellas are 

 peculiar to Devonian and above. 



Have you not found any more fossils? I should' think a careful 

 search might bring out specimens that could be determined accur- 

 ately ; and it would be interesting to have the means of determining 

 the species. 



I wish [ could speak more definitely; but this is the best I can 

 do with the specimens. Possibly this with the stratigraphical 

 study may enable you to fix the horizon. 

 With sincere regard, 



Henry S. Williams. 



(c) 



CRETACEOUS LEAVES. PRELIMINARY STATEMENT OF DR. LEO 



LESQUEREUX. 



The Cretaceous leaves that have been obtained in the state from the Creta- 

 ceous strata at various times and places, have been submitted to Mr. Lesque- 

 reux for determination and description. His final report will appear sub- 

 sequently, but the following is the result of a preliminary examination of a lot 

 of specimens sent. 



Dr. IJesqaereux* preliminary report. 



The content of the lot, received Jan. 14th, 1884, is as follows: 



No. 2143. From the north side of the Minnesota river, 



eight miles below New Ulm, represents 4 small 

 undeterminable fragments of leaves, without 

 trace of nervation. 

 No. 2143 (A) is apparently a Proteoides. 



No. 3808 and 5163. Ficus, sp. nov. No. 5163 is not marked in 

 the list; it is labelled Austin. 



No. 3911. Laurus Nebrascensis, Lesq., 1 leaf on three 



pieces. 



