128 New Publications. 
estcllidcc of the Hamilton, and hence the species described in this report 
are not included among the species contained in that volume. 
It would seem as if the stock of specific names was running low when 
an author as fertile in invention as professor Hall is compelled to use 
names for two distinct species, so similar in sound as Fenestclla quadran- 
gularis, an Upper Helderberg form, and F. qtiadrangula, a species from 
the Hamilton. Fencstella perutidata and F. pcriinduhifa, are two others 
that are likely to be confusingly similar. 
NEW PUBLICATIONS. 
/. Sfatc and Goi'crnincut reports. 
Mineral resources of the United States. Calendar 3 ear 1886. David 
T. Day, 8vo., 813 pp., price 50c. U. S. Gcol. Sur.., Washington. 
Report on the progress of the Kentucky geological survey for the 
years 1886 and 1887. John R. Proctor. Royal octavo, 28 pp. Frankfort, 
Kv. Robert Clarke and Co., Cincinnati. 
Annual report of the geological survey of Arkansas for 1887. John C. 
Branner. 8vo., 15 pp. Little Rock. 
Annvial report of the geological survey of Pennsylvania for 1886. J. 
P. Lesley, state geologist. Part II. Report on the oil and gas regions, 
bv John F. Carll. Report on the composition and fuel value of natural 
gas, by Francis C. Phillips. 8vo., 918 pp. Ilarrisburg. 
Geology and mining industry of Leadville, Colorado, with an atlas. 
Samuel Franklin Emmons. 4to., pp. 770; numerous plates and text il- 
lustrations. Monograph xii of the U. S. Geol. Sur., Washington . 
Sixth annual report of the state geologist, for the year 1886. James 
Hall. 8vo., pp. 70, and seven plates of fossils. Albany. 
Geological and Natural History survej' of Minnesota; 15th annual re- 
port. N. H. Winchell. 8vo., pp. 496. Two colored geological maps and 
numerous text illustrations of the structure of the crystalline rocks. St. 
Paul and Minneapolis. 
2. Proceedings of Scientific Societies. 
Transactions of the iSth and 19th sessions of the Kansas Academy of 
Science, 1885 and 1886. Vol. x. Svo., pp. 154; illustrated. Topeka. 
J. Papers in scientific journals 
In the y an nary N'o. of the Atncrican fourncd of Science. The speed of 
propagation of the Charleston earthquake. 2Vewcomb and Dutton. His- 
tory of changes in the Mt. Loa craters. Pt. I. Kilauea, Dana. The 
analysis and composition of tourmaline, Riggs. On the different types 
of the Devonian system in North America, Williams. On the law of 
double refraction in Iceland spar, Hastings. New genus of Sauropoda 
and other new dinosaurs from the Potomac formation. Marsh. Notice 
oi a new fossil Sirenian from California, Marsh. 
