274 Progress of Invertebrate Paleontology in [ April, 
teropoda, Pteropoda and Cephalopoda of the New York rocks 
with those of Europe. 
Dr. J. W. Dawson, in the November, 1880, number of the 
American Fournal of Science, published a “ Revision of the Land 
Snails of the Palzozoic Era. with Descriptions of New Species ;” 
" pages 403-415, with numerous wood-cuts. In this paper Dr. 
Dawson describes the following species, the second and last being 
new forms: Pupa vetusta Dawson, with the variety ¢enuistriata 
Dawson, Pupa bigsbyi Dawson, P..vermillionensis Bradley, Zonites 
(Conulus) priscus Carpenter, Dazsonella meeki Bradley, Strophites 
grandeva Dawson, The descriptions are accompanied with in- 
teresting discussions of the relations of these shells with living 
forms. 
In the January, 1880, number of the American Fournal of Sci- 
ence, page 50, Professor W. B. Dwight has given an account of his 
discoveries of fossils in the Wappinger valley, or Barnegat lime- 
stone of Duchess county, N. Y., which is a continuation of the 
subject as treated by him in the May, 1879, number of the same 
journal. In this article he has enumerated many well-known 
forms belonging to the Trenton and Calciferous epochs, and pro-_ 
posed the name Discina conica for a new form which he refers to 
the age of the Trenton limestone; and which, in the June, 1880, 
_ number of the Fournal, he describes and figures under the name 
of Orbiculoidea conica, Professor Dwight has also a brief article on 
the same subject in the’ January, 1881, number of the same jour- 
nal, in which he claims for the lower series of those rocks 
the existence of ‘a wealth of Cephalopodic life of a character 
and abundance hitherto unknown in the United States in any 
formation to which it is likely to belong, z. ¢., below the Trenton 
and Black River strata.” He proposes to publish full details of 
his discoveries, with further results. 
Mr. S. W. Ford has a note in the February, 1880, number of 
the American Fournal of Science, on the Aéops trilineatus of Em- 
mons, in which he claims that the species figured by Emmons in 
his Taconic System, p. 20, and in the Agricultural Report of New 
York, Vol. 1, p. 64, is not Zrarthrus beckiit, as supposed by Hall 
and Walcott, but that it belongs to the genus Conocoryphe. 
Professor James Hail is still prosecuting his great work on the 
Paleontology of New York. Part 1, of Vol. v, has been issued 
since my summary of last year’s palzeontological work was writ- 
sii eat ti aii Ti an lig 
