THE NAUTILUS. 35 
of which it is not necessary here to enumerate. In order, however, 
to ascertain what material suitable for a purely paleontological pub- 
lication may be available, we have concluded to offer a prize $50.00 
for the best American (North, Central or South) paleontological 
article presented for publication, as a separate Bulletin, before May 
1,1897. ‘The article must be a well written original monograph or 
report upon some special problem studied in the field or laboratory 
or both, i. e., not a mere compilation from books. This report may 
contain from 50 to 200 pages and from 5 to 10 full page plates of 
the size of our Bulletins. It may be written in any language using 
Roman characters. The judges named below shall have the power 
to divide the prize in two equal parts in case of doubt between the 
merits of two excellent articles, or to withhold the prize in case no 
suitable articles appear. 
Jupces: H.S. Williams, Yale University, New Haven, Conn. ; 
T. W.Stanton, U.S. Geol. Surv., Washington, D.C.; G. D. Harris, 
Cornell University, Ithaca, N. Y. 
Address all communications to G. D. Harris, Department of 
Paleontology, Cornell University, Ithaca, N. Y. 
AGRIOLIMAX CAMPESTRIS IN THE Pecos VALLEY, N. M@i— When 
recently at Roswell, N. M., J found a few specimens of Ag. campes- 
tris. This is only the second locality for the species known in New 
Mexico, and is the first record of any slug from the drainage-area 
of the Pecos River.—T. D. A. CocKERELL, Mesilla, N. M. 
THe Eprror acknowledges receipt of living West Coast Helices 
from Mrs. E. P. Gaylord and Mr. Fred L. Button. They are en- 
joying life in the vivarium of the Academy of Natural Sciences. 
NOTICES OF PUBLICATIONS RECEIVED. 
A Srupy oF THE UNIONIDE OF ARKANSAS, WITH INCIDENTAL 
REFERENCE TO THEIR DISTRIBUTION IN THE MissIsstppI VALLEY. 
By R. Ellsworth Call.—(Tr. Acad. Science of St. Louis, VII, 1895). 
Under the above title the author has published a catalogue of the 
Unionide. of the state of Arkansas, with partial bibliographic refer- 
ences and copious notes. The species are arranged in alphabetical 
