156 General Notes. [February, 
and thin, slightly contracted in width near the base, and at the 
distal extremity quite regularly rounded, with the free ends appar- 
ently slightly folded longitudinally, the edges appearing to be. 
slightly crenulated, though the folds were perhaps due to changes 
after death. the feet are of nearly the same size, and are 
about two-thirds as long as the carapace is high, being of nearly 
the same proportionate length as in Nebalia. There are no traces 
of a division into endopodites and exopodites, but we should 
be inclined to regard the parts preserved as the homologues of 
the exopodites of Nebalia. 
This specimen, then, indicates the existence in extinct Phyllo- 
carida of thin, broad, lamellate, thoracic limbs, in general appear- 
ance like those existing in Nebalia, and should this view be sub- 
stantiated by farther discoveries it will prove the reasonableness 
of uniting Ceratiocaris and its allies with the modern Nebalia. I 
had a year ago considered this form as new and gave it a MS. 
name Cryptozoé problematicas, as I was in doubt as to its affinities; 
but lately submitting it to Mr. C. E. Beecher, with the opinion that 
it was a Ceratiocaris, he writes me that he regards it as new to sci- 
ence. A description of the new genus and species, with figures, 
will appear hereafter —A. S. Packard. 
GEOLOGICAL SURVEY OF PENNsSYLVANIA.—Report of Progress X 
contains a geological hand-atlas of the sixty-seven counties of 
Pennsylvania, and is the work of J. P. Lesley, the chief of the sur- 
vey. The volume is one which ought to be in the hands of every 
one interested in field geology, embodying as it does, in convenient 
form, the entire results of the survey, so far as they can be carto- 
graphically represented. The maps are prefaced by an explanation 
of the geological structure of Pennsylvania,and a short account of 
e characteristic features of each county. 
GEOLOGICAL SuRVEY oF Munnesota.—Professor Winchell’s 
Twelfth Annual Report commences with a summary statement of 
work done. From this it appears that maps of thirty-two coun- 
ties are completed, and several others in course of preparation. 
A new trilobite of the genus Bathyurus is described. Professor 
Winchell gives an account of experiments with cubes of New 
England and Minnesota granites, and seems to prove the latter to 
be the stronger. . 3 
C. L. Herrick contributes a final report on the Crustacea of 
Minnesota (Cladocera and Copepoda). This occupies 191 pages, 
includes an account of the enemies of entomostrza, and appears 
to be exhaustive. It is illustrated with numerous plates. The 
volume concludes with a catalogue of the flora, by Warren 
Upham. It includes 1650 species, comprising vascular crypto- 
gams, but not fungi or alge. 
GEOLOGICAL News.—General—A, S. Woodward (Geol. Mag., 
Nov., 1885) gives a list of the British fossil Crocodilia. One spe- 
