(fieview of 'Keceyit Geological Literature. 127 
The author enumerates the palaeontologic evidence of refrigeration 
during the loess period, and regards the Council Bluffs specimens as 
affording the strongest possible support to the evidence previously accu- 
mulated. The New Madrid specimen of cavifrons was from the Port 
Hudson beds of Hilgard, a peculiar deposit found below the mouth of 
the Ohio and indicative of submergence of the lower Mississippi valley^ 
The Fort Gibson specimen comes from "a puzzling superficial deposit 
found in Missouri, Kansas, Indian territory, eastern Texas, and Arkan- 
sas, which seems to be a slack-water deposit laid down in the water 
ways of the region during the Port Hudson submergence." The Ken- 
tucky specimen comes from just beyond the margin of the drift region, 
while the specimens from Council Bluffs are found well within the gla- 
ciated area. 
During the culmination of the glacial conditions of the drift period it 
would seem that an arctic fauna, embracing the musk-ox, reindeer, hairy 
elephant and other northern species, was forced as far south as the lati- 
tude of Arkansas and the Indian territory. 
Sixth annual report of the state geologist, for the year 1886. Transmitted 
to the Legislature March /, 1887. By Prof. J.wies Hall. This is 3 
pamphlet of 70 pages, illustrated by eight plates and two maps. There 
are two papers by S. G. Williams — one on the Loiver Helderberg rocks of 
Cayuga lake, and the other on the Tully limestone, its distribution and itg 
known fossils. A map illustrating the distribution of the Tully limestone 
in central New York, accompanies the second paper. 
A paper on Annelid teeth from the lower portion of the Hamilton group 
and from the A^aples shales of Ontario county, JV. T., is by J. M. Clarke, 
and constitutes a valuable supplement to the work done by Dr. Hinde 
in the determination of the oral armature of the so-called Conodonts. 
The difficulties attending the specific determination of these minute 
fossils are fully recognized; and timely warning is given to the effect 
that " only in the correlated teeth of the opposite sides of a given jaw is 
there any marked similarity, while the different pairs and the unpaired 
or radular teeth, constituting the masticatory apparatus, widely vary," — - 
a warning that we trust will be heeded by our altogether too industri' 
ous species makers. The'paper is illustrated bj^ a plate containing twenty- 
nine figures of those curious and interesting forms. 
There is a notice of the discovery of a fossil tusk belonging, probablv,- 
to the skeleton of a joung elephant; a note and map on the distribution 
of the Dictyospongidoe, and a note on the discovery of an elk in the town- 
of P'armington, Ontario county. 
The longest paper in the report, by Prof. James Hall^ embraces des-- 
criptions of Fenestellidce of the Hamilton group, of Nexv Tork. The paper 
is accompanied by seven plates, and describes and illustrates a number 
of species of the genus J'enestella. The recently issued sixth volume 
of the Palaeontology of New York, on account of the limitations placed 
upon the number of plates it could contain, does not embrace the Fen- 
