1881. ] the United States for the year 1880. 279 
that has resulted from great time and change of conditions has 
been the fixing ante race-groups of the eatin variable charac- 
ters of the species.” 
Professor N. H. Winchell, in his Eighth her Report of the 
Geological and Natural History Survey of Minnesota for 1880, 
describes ten species of brachiopods from the Trenton and Hud- 
son River formations of that State. 
The following articles and notes have been published during the 
year 1880 by the writer of this article: “Descriptions of new 
species of Carboniferous Invertebrate Fossils” (illustrated) ; 
“Note on Exdothyra ornata ;” “Note on Criocardium and Eth- 
mocardium ;” “ Descriptions of new Invertebrate Fossils from 
Kansas and Texas” (illustrated); all in Vol. 11 Proceedings of 
the U. S. National Museum. In the first of these the genus 
Lecythiocrinus (not Lecythocrinus Miller nor Zittel) is proposed, and 
in the second the sub-genus Ev¢hmocardium,. Also in Vol. 111 of 
Proc. U. S. National Museum, “ Note on the occurrence of Pro- 
ductus giganteus in California” (illustrated) ; “ Note on Acrothele;” 
“ Description of a new Cretaceous Pinna from New Mexico; 
“Note on Stricklandinia salteri and S. davidsoni in Georgia ;” 
“ Description of a very large fossil Gasteropod from the State of 
Puebla, Mexico” (illustrated) ; ““ Descriptions of new Invertebrate 
Fossils from the Mesozoic rocks of Arkansas, Wyoming, Colo- 
rado and Utah.” In the July, 1880, number of the American 
Fournal of Science, he has an article “On the Antiquity of cer- 
tain subordinate types of fresh-water and land Mollusca,” in which 
itis shown that numerous types which characterize the living 
molluscan fauna of North America, had their origin at least as 
early as the earliest Eocene and later Cretaceous epochs. 
The Contributions to Invertebrate Palzontology, Nos. 2-8, 
which in the Narura.ist’s summary for 1879, were announced as 
in press, have been published as a single extract from the Twelfth 
Annual Report of the U.S. Geol. Survey of the Territories, and 
embrace, besides 171 pages of text, thirty-two plates instead of 
twenty-eight, as then announced. 
Besides the foregoing, which are already published, the writer 
of this article has in press a brief palzontological report to Capt. 
Geo. M. Wheeler, on some Carboniferous fossils from Northern 
New Mexico, with two quarto plates of illustrations; and also a 
report to Professor John Collett, State Geologist of Indiana, 
accompanied by eleven octavo plates of dlusieor 
