252 Progress of Invertebrate Paleontology in [ April, 
Report of the New York State Museum is in press; it contains 
descriptions of the Bryozoa of the Lower Helderberg group, 
adding fifty or sixty species to the list of those published in ʻa 
former report ; all being the work of Prof. Hall. 
The time of Prof. R. P. Whitfield, for the past year, has been 
largely employed in his duties at the American Museum of Nat- 
ural History at New York, and at the Troy Polytechnic Institute, 
but he has, meantime, continued his work upon the Palzeontology 
of the States of Ohio and Wisconsin, the results of which are to 
appear in Vol. 111 of the former and Vol. 1 of the latter, respect- 
ively, both of which volumes are well advanced toward comple- 
tion. At the Saratoga meeting of the American Association for 
the Advancement of Science, he read a paper on the Occurrence 
of rocks representing the Marcellus shale of New York, in Cen- 
tral Ohio; and published in the September number of the Arneri- 
can Fournal of Science.and Arts, p. 22, a note on the Occurrence 
of Maclurea magna in the Barnegat (Chazy) limestone near New- 
burg, N. Y. These:are brief papers, but they are important 
applications of paleontological identification of fossil forms to the 
elucidation of geological problems. 7 
Besides these, he has published in the same journal for January, 
1880, pages 33-42, an article on “ New Forts of Fossil Crusta- 
ceans from the Upper Devonian of Ohio,” in which he proposes 
the genera Echinocaris and Paleopalemon, describing three new 
species under the former, and one under the latter genus. He 
has also prepared a description and figures of a large and inter- 
esting Cretaceous brachyuran crustacean, Paramithrax (?) walkeri, 
which will appear in connection with the palzontological work of 
the writer of this article, in the Annual Report for 1878 of the 
U. S. Geological Survey, lately in charge of Dr. Hayden. His 
work for the Paleontology of Ohio will be illustrated by from 
fourteen to eighteen’ plates of figures. One of these plates will 
be devoted to the illustration of his new forms of Devonian Crus- 
taceans already mentioned, and one of them, in part, to the illus- 
tration of those forms upon which he bases his conclusions of 
the occurrence of Marcellus shale in Ohio, also before mentioned. 
The report will contain descriptions of new and known forms 
from the Lower Helderberg, Upper Helderberg and Upper De- 
vonian; also the entire known fauna of the Maxwell limestone 
(=Chester and St. Louis series) and some other upper and lower 
